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Open Access 22.04.2019 | Open Forum

# The race for an artificial general intelligence: implications for public policy

verfasst von: Wim Naudé, Nicola Dimitri

Erschienen in: AI & SOCIETY | Ausgabe 2/2020

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## Abstract

An arms race for an artificial general intelligence (AGI) would be detrimental for and even pose an existential threat to humanity if it results in an unfriendly AGI. In this paper, an all-pay contest model is developed to derive implications for public policy to avoid such an outcome. It is established that, in a winner-takes-all race, where players must invest in R&D, only the most competitive teams will participate. Thus, given the difficulty of AGI, the number of competing teams is unlikely ever to be very large. It is also established that the intention of teams competing in an AGI race, as well as the possibility of an intermediate outcome (prize), is important. The possibility of an intermediate prize will raise the probability of finding the dominant AGI application and, hence, will make public control more urgent. It is recommended that the danger of an unfriendly AGI can be reduced by taxing AI and using public procurement. This would reduce the pay-off of contestants, raise the amount of R&D needed to compete, and coordinate and incentivize co-operation. This will help to alleviate the control and political problems in AI. Future research is needed to elaborate the design of systems of public procurement of AI innovation and for appropriately adjusting the legal frameworks underpinning high-tech innovation, in particular dealing with patenting by AI.
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## 1 Introduction

According to Sundar Pichai, CEO of Google1, Artificial Intelligence (AI) is probably the most important thing humanity which has ever worked on$$\ldots$$ more profound than electricity or fire. AI is expected to be one of the most disruptive new emerging technologies (Van de Gevel and Noussair 2013). Virtual digital assistants such as Amazon’s Echo and Alexa, Apple’s Siri, and Microsoft’s Cortana have become household names by making online shopping easier; automated vehicles from Tesla and Uber are excitedly anticipated to alleviate transport congestion and accidents; Googles Google Duplex outraged commentators with its ability make telephone calls in a human voice. More generally, AI is increasingly being used to optimize energy use in family homes, improve diagnoses of illness, help design new medications, and assist in surgery, amongst others (Makridakis 2017). In short, AI is resulting in things getting ‘easier, cheaper, and abundant’ (Cukier 2018, p.  165).
AI refers to ‘machines that act intelligently $$\ldots$$ when a machine can make the right decision in uncertain circumstances; it can be said to be intelligent’ (New Scientist 2017, p.  3). A distinction needs to be made between ‘narrow’ (or ‘weak’) AI and Artificial General Intelligence (AGI) (‘strong’ AI). Narrow AI is an AI that makes use of algorithms to exploit large volumes of data to make predictions, using ‘deep learning’2 to learn more from data about a specific domain (LeCun et al. 2015). Narrow AI is, therefore, domain-specific, excellent at specific tasks such as playing chess or recommending a product; its ‘intelligence’, however, cannot transfer to another domain. In contrast, AGI refers to a true intelligence that would be indistinguishable from human intelligence and that can be applied to all problem solving, and that would present a new general-purpose technology (Trajtenberg 2018).
AGI does not exist at the time of writing this paper. All aforementioned examples of AI are narrow AI applications. Whilst impressive it remains the case that these are mindless algorithms, with ‘the intelligence of an abacus: that is, zero’ (Floridi 2018, p.  157). They pose in this form no existential threat to humans (Bentley 2018). Although an AGI with general capabilities that are comparable to human intelligence does not yet exist, it remains an enticing goal.
Many scientists have predicted that with advances in computing power, data science, cognitive neuroscience, and bio-engineering continuing at an exponential rate (often citing Moore’s Law) that a ‘Singularity’ point will be reached in the not-too-distant future, at which time AGI will exceed human-level intelligence (Kurzweil 2005). It may result in an ‘intelligence explosion’ (Chalmers 2010) heralding a ‘human-machine civilization’ (Van de Gevel and Noussair 2013, p.  2). At this point ‘economic growth will accelerate sharply as an ever-increasing pace of improvements cascade through the economy’ (Nordhaus 2015, p.  2). The year 2045 has been identified as a likely date for the singularity (Kurzweil 2005; Brynjolfsson et al. 2017; AI Impacts 2015).
Whichever high-tech firm or government lab succeed in inventing the first AGI will obtain a potentially world-dominating technology. The gap in welfare between countries where an AGI reside and where a ‘Singularity’ is achieved, and other, a lagging countries, could grow exponentially. Moreover, if the countries with the first access to an AGI technology progress with such leaps and bounds that their citizens ‘extend their lifespans tenfold‘ and even start to merge with robots, then one could see an entire new class of specially privileged humans appear (Van de Gevel and Noussair 2013).
This potential winner-takes-all prize that the invention of a true AGI raises the spectre of a competitive race for an AGI.3 The incentives for high-tech firms to engage in a race are twofold. One, as discussed above, is that the first-mover advantage and likely winner-takes-all effect for a firm that invents the first truly AGI (Armstrong et al. 2016). Second, given that two-thirds of GDP in advanced economies are paid to labor, any AI that would make labor much more productive would have a substantial economic return (Van de Gevel and Noussair 2013; PwC 2017). In addition to these monetary incentives, a further motivating factor to race to invent an AGI is due to the beliefs, often religious-like, that more and more people have in technology as saviour of humanity. See the discussion in Evans (2017) and Harari (2011, 2016).4
The problem with a race for an AGI is that it may result in a poor-quality AGI that does not take the welfare of humanity into consideration (Bostrom 2017). This is because the competing firms in the arms race may cut corners and compromise on the safety standards in AGI (Armstrong et al. 2016). This could result in an ‘AI disaster’ where an AGI wipe out all humans, either intentionally or neglectfully, or may be misused by some humans against others, or benefit only a small subset of humanity (AI Impacts 2016). Chalmers (2010) raises the spectre of a ‘Singularity bomb’ which would be an AI designed to destroy the planet. As Stephan Hawking has warned, AGI could be the ‘worst mistake in history’ (Ford 2016, p.  225).
To avoid the ‘worst mistake in history’, it is necessary to understand the nature of an AGI race, and how to avoid that it leads to unfriendly AGI. In this light, the present paper develops an all-pay contest model of an AGI race and to establish the following results. First, in a winner-takes-all race, where players must invest in R&D, only the most competitive teams will participate. Thus, given the difficulty of AGI, the number of competing teams is unlikely ever to be very large. This reduces the control problem. Second, the intention of teams competing in an AGI race as well as the possibility of an intermediate outcome (prize) is important. The possibility of an intermediate prize will improve the probability that an AGI will be created and, hence, make public control even more urgent. The key policy recommendations are to tax AI and use public procurement. These measures would reduce the pay-off of contestants, raise the amount of R&D needed to compete, and coordinate and incentivize co-operation.
The novel contribution of this paper is to build on the pioneering paper of Armstrong et al. (2016), and provide a rigorous and strategic analysis, from an economics perspective, on how government policies can influence the nature of AI. Armstrong et al. (2016) established that the likelihood of avoiding an AI disaster and getting a ‘friendlier’ AGI depends crucially on reducing the number of competing teams. They also established that, with better AI development capabilities, research teams will be less inclined to take risks in compromising on safety and alignment. The unanswered questions in the Armstrong et al. (2016) model are, however, precisely how government can steer the number of competing teams? How can government policy reduce competition in the race for an AGI and raise the importance of capability? Should AI be taxed and/or nationalized? In this paper, the contribution is to answer these questions and show that the danger of an unfriendly AGI can indeed, in principle, be reduced by taxing AI and using public procurement. This would reduce the pay-off of contestants, raise the amount of R&D needed to compete, and coordinate and incentivize co-operation. All of these effects will help to alleviate the control and political problems in AI.
The paper is structured as follows. Section 2 provides an overview of the current literature and underscores the importance of development of a friendly AI and the fundamental challenges in this respect, consisting of a control (or alignment) problem and a political problem. In Sect. 3 an all-pay contest model of an AGI race is developed wherein the key mechanisms and public policy instruments to reduce an unfavorable outcome are identified. Section 4 discusses various policy implications. Section 5 concludes with a summary and recommendations.
An AGI does not yet exist, although it has been claimed that, by the year 2045, AGI will be strong enough to trigger a ‘Singularity’ (Brynjolfsson et al. 2017). These claims are based on substantial current activity in AI, reflected amongst others in rising R&D expenditure and patenting in AI5 (Webb et al. 2018) and rising investment into new AI-based businesses.6 The search is on to develop the best AI algorithms, the fastest supercomputers, and to possess the largest data sets.
This has resulted in what can be described as an AI race between high-tech giants such as Facebook, Google, Amazon, Alibaba and Tencent amongst others. Governments are not neutral in this: the Chinese government is providing much direct support for the development of AI,7 aiming explicitly to be the world’s leader in AI by 2030 (Mubayi et al. 2017); in 2016, the USA government8 released its ‘National Artificial Intelligence Research and Development Strategic Plan’ and, in 2018, the UK’s Select Committee on Artificial Intelligence, appointed by the House of Lords, released their report on a strategic vision for AI in the UK, arguing that ‘the UK is in a strong position to be among the world leaders in the development of artificial intelligence during the twenty-first century‘ (House of Lords 2018, p.  5).
The races or contests in AI development are largely in the narrow domains of AI. These pose, at present, no existential threat to humans (Bentley 2018), although relative lesser threats and problems in the design and application of these narrow AI have, in recent times, been the subject of increased scrutiny.9 For instance, narrow AI and related ICT technologies have been misused for hacking, fake news and have been criticized for being biased, for invading privacy and even for threatening democracy [see Cockburn et al. (2017), Gill (2016), Helbing et al. (2017), Susaria (2018), Sharma (2018)]. The potential for narrow AI applications to automate jobs and, thus, raise unemployment and inequality have led to a growing debate and scholarly literature [see Acemoglu and Restrepo (2017), Bessen (2018), Brynjolfsson and McAfee (2015), Frey and Osborne (2017), Ford (2016)]. All of these issues have raised calls for more robust government regulation and steering or control of (narrow) AI (Baum 2017; Korinek and Stiglitz 2017; Kanbur 2018; Metzinger et al. 2018; WEF 2018).
More concern for its existential risks to humanity has been on races to develop an AGI. Given the huge incentives for inventing an AGI, it is precautionary to assume that such a race is part of the general AI race that was described in the above paragraphs. As was mentioned, whichever high-tech firm or government lab succeed in inventing the first AGI will obtain a potentially world-dominating technology. Whatever AGI first emerges will have the opportunity to suppress any other AGI from arising (Yudkowsky 2008). They will enjoy winner-takes-all profits.
Whereas narrow AI may pose challenges that require more and better government control and regulation, it still poses no existential risk to humanity (Bentley 2018). With an AGI, it is a different matter. There are three sources of risk.
The first is that a race to be the winner in inventing an AGI will result in a poor-quality AGI (Bostrom 2017). This is because the competing firms in the arms race may cut corners and compromise on the safety standards in AGI (Armstrong et al. 2016).
A second is that the race may be won by a malevolent group, perhaps, a terrorist group or state who then use the AGI to either wipe out all humans or misused it against others (AI Impacts 2016; Chalmers 2010). Less dramatically, it may be won by a self-interest group who monopolizes the benefits of an AGI for itself (Bostrom 2017).
A third is that even if the winner designs an AGI that appears to be friendly, it may still have compromised on ensuring that this is the case and leave it open that the AGI will not necessarily serve the interests of humans. In this latter case, the challenge has been described as the ‘Fallacy of the Giant Cheesecake’. As put by Yudkowsky (2008, p.  314–315):
‘A superintelligence could build enormous cheesecakes cheesecakes the size of cities by golly, the future will be full of giant cheesecakes! The question is whether the superintelligence wants to build giant cheesecakes. The vision leaps directly from capability to actuality, without considering the necessary intermediate of motive’.
There is no guarantee that an AGI will have the motive, or reason, to help humans. In fact, it may even, deliberately or accidently, wipe out humanity, or make it easier for humans to wipe itself out.10 This uncertainty is what many see as, perhaps, the most dangerous aspects of current investments into developing an AGI, because no cost–benefit analysis can be made, and risks cannot be quantified (Yudkowsky 2008).
Thus, it seems that there is a strong prudential case to be made for steering the development of all AI, but especially so for an AGI, where the risks are existential. In particular, a competitive race for an AGI seems very unhelpful, as it will accentuate the three sources of risk discussed above (Naudé 2019).
Furthermore, a competitive race for an AGI would be sub-optimal from the point of view of nature of an AGI as a public good (AI Impacts 2016). An AGI would be a ‘single-best effort public good’ which is the kind of global public good that can be supplied ‘unilaterally or multilaterally’; that is, it requires a deliberate effort of one country or a coalition of countries to be generated, but will benefit all countries in the world once it is available (Barrett 2007, p.  3).
To steer the development of AGI, and specifically through ameliorating the dangers of a race for an AGI, the literature has identified two generic problems: the control problem (or alignment problem) and the political problem (Bostrom 2014, 2017).
The control problem is defined by Bostrom (2014, p.  v) as ‘the problem of how to control what the superintelligence would do’; in other words, the challenge to ‘design AI systems, such that they do what their designers intend’ (Bostrom 2017, p.  5). This is also known as the ‘alignment problem’, of how to align the objectives or values of humans with the outcomes of what the AGI will do. Yudkowsky (2016) illustrates why the alignment problem is a very hard problem; for instance, if the reward function (or utility function) that the AGI optimizes indicates that all harm to humans should be prevented, an AGI may try to prevent people from crossing the street, given that there may be a small probability that people may get hurt by doing so. In other words, as Gallagher (2018) has put it, the difficulty of aligning AI is that ‘a misaligned AI does not need to be malicious to do us harm’. See also Everitt and Hutter (2008) for a discussion of sources of misalignment that can arise.
The political problem in AI research refers to the challenge ‘how to achieve a situation in which individuals or institutions empowered by such AI use it in ways that promote the common good’ (Bostrom 2017, p.  5). For instance, promoting the common good would lead society to try and prevent that any self-interested group monopolizes the benefits of an AGI for itself (Bostrom 2017).
Both the control problem and the political problem may be made worse if a race for an AGI starts. This is illustrated by (Armstrong et al. 2016) who provides one of the first models of an AI race. In their model, there are various competing teams all racing to develop the first AGI. They are spurned on by the incentive of reaping winner-takes-all effects and will do so if they can by ‘skimping’ on safety precautions (including alignment) (Armstrong et al. 2016, p.  201). As winner, they can monopolize the benefits of AGI, and during the race, they be less concerned about alignment. The outcome could, therefore, be of the worse kind.
The model of Armstrong et al. (2016) shows that the likelihood of avoiding an AI disaster and getting a ‘friendlier’ AGI depends crucially on reducing the number of competing teams. They also show that, with better AI development capabilities, research teams will be less inclined to take risks in compromising on safety and alignment. As these are core results from which the modeling in the next section of this paper proceeds from, it is worthwhile to provide a short summary of the Armstrong et al. (2016) model in this respect.
They model n different teams, each with an ability c, and with choice s of ‘safety precautions’ (which can also be taken to stand for degree of alignment more broadly) where $$0 \leq s \leq 1$$ with $$s =0$$ when there is no alignment and $$s =1$$ when there is perfect alignment. They award each team a score of $$(c-s)$$ and the team with the highest score wins by creating the first AGI. Whether or not the AGI is friendly depends on the degree of alignment (s) of the winning team. They assume that teams do not have a choice of c, which is randomly assigned as given by the exogenous state of technology, and then show that the Nash equilibrium depends on the information that the teams have about their own c and the c of other teams. They can have either no information, only information about their own c, or full public information about every teams c.
Under each Nash equilibrium, Armstrong et al. (2016) then calculates the probability of an AI disaster with either two or five teams competing. Their results show that ‘competition might spur a race to the bottom if there are too many teams’ (p.   205) and that ‘increasing the importance of capability must decrease overall risk. One is less inclined to skimp on safety precautions if one can only get a small advantage from doing so’ (p.   204).
The unanswered question in the Armstrong et al. (2016) model is precisely how government can steer the number of competing teams? How can government policy reduce competition in the race for an AGI and raise the importance of capability? Should AI be taxed and/or nationalized?
In the next section, an all-pay contest model is used to study the determinants of the decisions of potential AGI competing teams to invest in and compete an AGI race and to answer the above questions. All-pay contests models are a class of games where various participants compete for a prize, or more than one prize. Their distinguishing feature is that everyone pays for participation, and so, losers will also have to pay. Moreover, since Tullock (1980) contests have been conceived as probabilistic competitions where despite the effort made victory is not certain, and with the winning probability being positively related to ones investment and negative related to the opponents investment. They have been applied to a variety of socio-economic situations (Konrad 2009; Kydd 2015; Vojnovic 2015). An important aspect of contests is individual asymmetries (Siegel 2009) which, as in the model used in the present paper, could determine if, and how much, effort would be exerted in the competition. It is appropriate to study an AGI arms race as an all-pay contest given that, as Armstrong et al. (2016) also stress, the differing ability (c in their model) of competing teams (and their information about this c) is a determining factor in the race. Indeed, all-pay contest models have been used in the literature to study very similar problems, such as, for instance, R&D competitions (Dasgupta 1986).
In the next section, the model is used to illustrate, inter alia, that by taxing AI and by publicly procuring an AGI, that the public sector could reduce the pay-off from an AGI, raising the amount of R&D that firms need to invest in AGI development, coordinate and incentivize co-operation, and, hence, address the control and political problems in AI. It is also showed that the intention (or goals) of teams competing in an AGI race, as well as the possibility of an intermediate outcome (second prize) may be important. Specifically, there will be more competitors in the race if the most competitive firm has objective probability of success, rather than profit maximization, and if some intermediate result (or second prize) is possible, rather than only one dominant AGI.

## 3 Theoretical model

The following simple model can provide some insights on various potential teams decision to enter into and behavior in an AGI arms race. Assuming the AGI arms race to be a winner-takes-all type of competition (as we discussed in Sect. 2), it can be modeled as an all-pay contest, where only the winning team gets a prize, the invention of the AGI, but every team has to invest resources to enter the race, and so everyone pays. With no major loss of generality, for an initial illustration of the model, consider the following static framework in Sect. 3.1.

### 3.1 Set-up and decision to enter the race

The decision to enter an AGI race will depend on a team’s perceptions of the factors that will most critically affect its possibility to win the race: (1) its own current technology, the (2) effort made by competing teams; and (3) the unit cost of a team’s own effort.
Suppose that $$i\,\,=\,\,1,2$$ denotes two teams. Each team participates in the race for developing an AGI, which will dominate all previous AI applications and confer a definitive advantage over the other team. The final outcome of such investment is normalized to 1 in case the AGI race is won, and to 0 if the AGI race is lost. Later, this assumption of only one prize to the winner is relaxed, and an intermediate possibility, akin to a second prize, will be considered given that there may still be commercial value in the investments that the losing firm has undertaken.
If $$x_i$$ is the amount invested by team i in the race and $$0\leq a_i \leq1$$, then the probability for team i to win the AGI race is given by the following:
\begin{aligned} p_i=a_i \left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right) , \end{aligned}
(1)
with $$i \neq j=1,2.$$
Some comments are in order.
Expression (1) is a specification of the so-called contest function (Konrad 2009; Vojnovic 2015) which defines the winning probability in a competition.
The parameter $$a_{i}$$ is the maximum probability that team i will invent the dominating AGI application. In this sense, it can interpreted as what team i can innovate, since, based on the team’s technology and knowledge and innovation capability, it could not achieve a higher likelihood of success.
The number $$b_{i}\geq 0$$ reflects how team i can find the AGI dominant application. This is because even if the opponent does not invest, $$x_{j} = 0$$, team i may still fail to obtain the highest successful probability $$a_{i}$$, since, for $$b_{i}>0$$, it is
\begin{aligned} a_{i} \left( \frac{x_{i}}{b_{i}+x_{i}}\right) <a_{i}. \end{aligned}
(2)
If $$b_{i} = 0$$, then team i could achieve $$a_{i}$$ with arbitrarily small investment $$x_{i}> 0$$, which means that the only obstacle preventing i to obtain the highest possible success probability is the opposing team.
Success in the race depends on how much the opponents invest as well as on the technological difficulty associated to the R&D process. For this reason, it may be that even with very high levels of investment, success may not be guaranteed, since technological difficulties could be insurmountable given the current level of knowledge, see Marcus (2015).
Parameters $$a_{i}$$ and $$b_{i}$$ formalize the intrinsic difficulty for team i of the AI R&D activity: the higher $$a_{i}$$ the higher potential has $$i's$$ technology, while the higher is $$b_{i}$$ the more difficult is R&D. Based on (1), it follows that the total probability that one of the two teams will find the dominating AGI application is:
\begin{aligned} a_{1}\left( \frac{x_{1}}{b_{1}+x_{1}+x_{2}}\right) + a_{2}\left( \frac{x_{2}}{b_{2}+x_{1}+x_{2}}\right) \leq 1, \end{aligned}
(3)
where (3) is satisfied with equality only if $$a_i=1$$ and $$b_i=0$$ for both $$i=1,2$$. When (3) is satisfied as a strict inequality, there is a positive probability that no team would succeed in winning the race, due to the difficulty of the R&D process, given that AGI is a ‘hard’ challenge (Van de Gevel and Noussair 2013).
For both teams, it is assumed that the winning probability is the objective function and that its maximization is their goal, subject to the (economic) constraint that the expected profit should be non-negative. Moreover, if $$c_i$$ is the unit cost for team i, then the firm’s profit is a random variable defined as: $$\Pi _{i}=1-c_{i} x_{i}$$ with probability $$a_{i}\left( \frac{x_{i}}{b_{i} +x_{i}+x_{j}}\right)$$ and $$\Pi _{i} = -c_{i} x_{i}$$ with probability $$1-a_{i}\left( \frac{x_{i}}{b_{i} +x_{i}+x_{j}}\right).$$
This means that the team’s expected profit is given by the following:
\begin{aligned} E\Pi _{i}=a_{i}\left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right) -c_{i}x_{i} \end{aligned}
(4)
so that $$E\Pi _{i}\geq 0$$ defines self-sustainability of the R&D process, which represents the constraint in the probability maximization problem. Hence, team i’s problem, in the AGI race, can be formulated as $${\rm Max}_{x_{i}} a_{i}\left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right)$$, such that $$E\Pi _{i} = a_{i}\left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right) -c_{i} x_{i}\geq0$$ and $$x_{i}\geq0$$.
Defining $$\rho _{i}=\frac{a_{i}}{c_{i}}-b_{i}$$, it is possible to find the best response correspondences $$x_{1}=B_{1} (x_{2})$$ and $$x_{2}=B_{2} (x_{1})$$ for the two teams as follows:
\begin{aligned} x_{1}=B_{1} (x_{2})=0, \end{aligned}
(5)
if $$\rho _1 \leq x_2$$
or
\begin{aligned} x_{1}=B_{1} (x_{2})=\rho _1 - x_2, \end{aligned}
(6)
if otherwise, and
\begin{aligned} x_{2}=B_{2} (x_{1})=0, \end{aligned}
(7)
if $$\rho _2\leq x_1$$
or
\begin{aligned} x_{2}=B_{2} (x_{1})=\rho _2-x_1, \end{aligned}
(8)
if otherwise.
The coefficient $$\rho _{i}$$ is a summary of the relevant economic and technological parameters playing a role in the AGI arms race, including as was discussed in Sect. 2, the state of technology, the capability of teams, the openness of information, and the potential size of the winner-take-all effects. For this reason, $$\rho _{i}$$ is the competition coefficient of player i.
The following first result can now be formulated as proposition 1:
Proposition 1
Suppose$$\rho _{1}> max(0,\rho _{2})$$: then the unique Nash equilibrium of the AGI race is the pair of strategies$$(x_{1}=\rho _{1};x_{2}=0)$$, while if$$max (\rho _{1},\rho _{2}) \leq 0$$the unique Nash equilibrium of the game is$$(x_{1}=0; x_{2}=0)$$. If$$\rho _{2}> max(0, \rho _{1})$$then the unique Nash equilibrium of the game is the pair of strategies$$(x_{1}=0; x_{2}=\rho _{2})$$. Finally, if$$\rho _{1}=\rho =\rho _{2}$$then any pair$$(x_{1}=x; x_{2}=\rho -x)$$with$$0\leq x \leq \rho$$is a Nash equilibrium of the game.
Proof
see Appendix 1. $$\square$$
The above result provides some early, interesting, insights. In general, in such a winner takes-all race, only the team with the best competition coefficient will participate in the race, while the other (s) will not enter the race. If teams have the same coefficient, they both participate (unless $$\rho \leq0$$) in which case, there is a multiplicity of Nash equilibria.
When the Nash Equilibrium is defined by $$(x_{i}=\frac{a_{i}}{c_{i}} -b_{i};\, x_{j}=0)$$, the winning probability (1) for team i is as follows:
\begin{aligned} p_{i}=a_{i} \left( \frac{\frac{a_{i}}{c_{i}}-b_{i}}{\frac{a_{i}}{c_{i}}}\right) = a_i - c_i b_i. \end{aligned}
(9)
In other words, the winning probability is equal to the maximum probability of success $$a_i$$ minus a term which is increasing in the unit cost and the technological parameter $$b_i$$. The smaller are these last two quantities, the closer to its maximum is team i’ s winning probability.
The above result can be generalized to any number $$n>1$$ of teams as follows.
Corollary 1
Suppose$$\rho _1=\rho _2=\ldots =\rho _k = \rho> \rho _{k+1}\geq \ldots\geq \rho _n$$, with$$1\leq k \leq n$$the competition coefficients of thenteams. Then, any profile$$z= (x_1, x_2,\ldots , x_k, x_{k+1} = 0, x_{k+2} = 0,\ldots ,x_n=0)$$with$$x_i\geq 0$$for all$$i=1,2,\ldots ,n$$and$$\Sigma x_i=\rho$$is a Nash equilibrium, since, for each$$i=1,2,\ldots ,n$$the best reply correspondence is defined as$$x_i = B_{i}(x_{-i})=0$$if$$\rho _i \leq x_{-i}$$and$$x_i = B_{i}(x_{-i})=\rho _i-x_{-i}$$, if otherwise, with$$x_{-i}= z-x_{j}.$$
Proof
see Appendix 2. $$\square$$
It is easy to see that any of the above profiles is a Nash equilibrium by simply checking that each component is best reply against the remaining ones.
To summarize, in a winner-takes-all race for developing an AGI, where players must invest in R&D effort to maximize success probability, only the most competitive teams will participate, while the others would prefer not to. This suggests that, given the ‘hard’ challenge that AGI poses, the degree of competition in the race, as reflected by the number of competing teams, is unlikely to be very large, thus potentially signaling that the control problem is not as arduous as may be assumed. Armstrong et al. (2016) is, for instance, concerned about the number of teams competing for AI. The conclusion that the number of competing teams for a AGI will never be very large seems at least at present, to be borne out by the fact that most of the competitive research into AI, as reflected by USA patent applications in, for example, machine learning, is by far dominated by only three firms:11 Amazon, IBM and Google (Webb et al. 2018).

### 3.2 Goals of competing teams

The pool of participating teams may change if teams would pursue alternative goals. To see this, consider again two teams, $$i=1,2$$ with $$\rho _1> \rho _2$$ but now suppose that team 1, rather than maximizing success probability would pursue expected profit maximization. That is, it would solve the following problem:
\begin{aligned}{\rm Max}_{x_{1}}= & {\rm Max}\left( 0,E\Pi _1 = a_1 \left(\frac{x_{1}}{b_{1} +x _{1} + x_{2}}\right) -c_1 x_1 \right)\\&{\rm such, that} \,\, x_1 \geq 0. \end{aligned}
(10)
From the first-order conditions for team 1, one can derive the following:
\begin{aligned} x_1=B_1 (x_2)=\sqrt{\frac{a_{1}}{c_{1}}(b_{1}+x_{2})} -(b_{1}+x_{2}). \end{aligned}
(11)
Because when $$\rho _1>0$$ at $$x_2 = 0$$, it is $$0< B_1 (0) = \sqrt{\frac{a_{1}}{c_{1}}b_1} - b_1 < \rho _1$$, and since (11) is concave in $$x_2$$, with $$B_1 (x_2 )=0$$ at $$x_2=-b_1$$ and $$x_2=\rho _1$$, the following holds:
Proposition 2
Suppose that $$\rho _1> 0$$. If$$\sqrt{\frac{a_{1}}{c_{1}}b_1}- b_1\geq {\rm Max}(0,\rho _2)$$, then the unique Nash equilibrium of the game is the pair of strategies$$(x_1=\sqrt{\frac{a_{1}}{c_{1}}b_1}- b_1 ;x_2=0)$$. If$$0< \sqrt{\frac{a_{1}}{c_{1}}b_1}- b_1 \leq \rho _2$$, then$$(x_1 = \rho _2-x_2; x_2=\frac{(\rho _{2}+b_{1})^{2}c_{1}}{a_{1}} -b_1)$$is the unique Nash equilibrium:
Proof
see Appendix 3$$\square$$
Proposition 2 illustrates conditions for which both teams could participate in the AGI race, but pursue different goals. The intuition is the following. If the more competitive team maximizes profit, then, in general, it would invest less to try to win the race, than when aiming to maximize the probability of winning. As a result, the less competitive team would not be discouraged by an opponent whom invests a high amount, and in turn, take part in the race.

## 4 Comparative statics and policy implications

In this section, it is explored how the teams’ behavior can be affected by changing some of the elements in the race. In the first Sect. 4.1, the set of possible race outcomes are enlarged.

### 4.1 A more general AGI race: allowing for a second prize

Consider again the previous two team model but suppose that the set of outcomes rather than being 0 or 1, that is either the dominant AGI application is found, or nothing is found, there is a possible third result $$0< \alpha < 1$$. This is to model the idea that some intermediate outcome, between dominance and failure, could obtain even when the most desirable AGI application is not achieved. This is akin to a ‘second prize’.
The interest here is in exploring how such partial success (failure) could impact on the investment decision of participating teams. Moreover, introducing a third outcome (or second prize) can provide insights on the possible role of the public sector in steering the AGI race.
In what follows, it is assumed that achieving the dominant AGI application implies also obtaining the intermediate outcome, but that, in this case, only the dominant application will matter. Moreover, to keep things sufficiently simple, team i’s probability of obtaining only the intermediate outcome is given by $$d_i (\frac{x_{i}}{b_{i}+x_{i}+x_{j}})$$, with $$0< \alpha _i\leq d_i <1$$, modeling the idea that the technology for obtaining such AGI application is the same as for the dominant application, except for a higher upper bound in the success probability.
For this reason, assuming that $$0\leq (\alpha _i + d_i) \leq 1$$ team i’s profit function can take on three possibilities:
\begin{aligned} \Pi _i= & {} 1-c_ix_i \,\text{with probability} \, a_i\left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right) , \end{aligned}
(12)
\begin{aligned} \Pi _i= & \alpha -c_ix_i \, \text{ with probability} \, d_i\left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right), \end{aligned}
(13)
\begin{aligned} \Pi _i= & -c_ix_i \, \text{ with probability} \, 1-(a_i+d_i)\left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right) , \end{aligned}
(14)
and its expected profit is given by the following:
\begin{aligned} E\Pi _i=(a_i+\alpha d_i) \left( \frac{x_{i}}{b_{i}+x_{i}+x_{j}}\right) -c_i x_i, \end{aligned}
(15)
that is as if the race was still with two outcomes, 0 and 1, but with success probability now given by $$(a_i+\alpha d_i)(\frac{x_{i}}{b_{i}+x_{i}+x_{j}})$$ rather than only by $$a_i (\frac{x_{i}}{b_{i}+x_{i}+x_{j}})$$.
Notice that (12)–(14) implies that, unlike the dominant winner-takes-all AGI application, $$\alpha$$ could also be obtained by both teams and not by one of them only.
Therefore, posing $$\acute{a}_i=(a_i+\alpha d_i)$$ and defining the modified competition coefficient as $$\acute{\rho _{i}} = \frac{\acute{\alpha _{i}}}{c_{i}} - b_i$$, the following is an immediate consequence of Proposition 1:
Corollary 2
Suppose$$\acute{\rho }_1> max(0, \acute{\rho }_2)$$: then the unique Nash equilibrium of the AGI race is the pair of strategies$$(x_1=\acute{\rho }_1; x_2=0)$$, while if$$max(\acute{\rho }_1, \acute{\rho }_2) \leq 0$$the unique Nash equilibrium of the game is$$(x_1 = 0; x_2 =0)$$. If$$\acute{\rho }_2> max(0,\acute{\rho }_1)$$, then the unique Nash equilibrium of the game is the pair of strategies$$(x_1=0; x_2= \acute{\rho }_2$$. Finally, if$$\acute{\rho }_1 = \rho = \acute{\rho } _2$$, then any pair$$(x_1=x; x_2 =\acute{\rho } -x)$$with$$0\leq x \leq\acute{\rho }$$is a Nash equilibrium of the game.
The implication from this extension is as follows. Since $$\acute{a}_i> a$$, then $$\acute{\rho }_i> \rho _i$$: therefore, when a second prize is possible, teams in the race will tend to invest more than without such a possibility. Therefore, the presence of such intermediate result or second prize serve as an incentive to strengthen team efforts, increasing both the probability of finding the dominant AGI application as well as the non-dominant one. The outcome reduces the risk of complete failure and in so doing induces higher investments than in a pure winner-takes-all race.
In this case, it is easy to see that outcome 1 would be obtained with probability:
\begin{aligned} \acute{p}_i = \frac{(\acute{a}_i - c_i b_i)\acute{a}_i}{\acute{a}_i} \end{aligned}
(16)
and outcome $$\alpha$$ with probability:
\begin{aligned} q_i =d_i\left( \frac{\frac{\acute{a_i}}{c_i}-b_i}{\frac{\acute{a_i}}{c_i}}\right) = \frac{d_i(\acute{a_i}-c_ib_i)}{\acute{a_i}}= \frac{d_i \acute{p_i}}{\acute{a_i}} \end{aligned}.
(17)
with $$q_i< \acute{p_i}$$ if $$a_i< d_i < \frac{a_i}{(1-\alpha )}$$, that is if $$d_i$$ is small enough.

### 4.2 Policy implications

One of the main conclusions from the literature surveyed in Sect. 2 is that the avoidance of an AGI race would require government to influence AGI research in a manner that will reduce the returns to teams from taking risks in AI development.
In this regard, the model results set out in the preceding sections suggest a number of policy implications to steer the race for an AGI.
To see this, first, consider the above winner-takes-all race with no intermediate outcome (no second prize) (Sect. 3.1) and assume that the dominant AGI application, if found, would be considered by a public authority undesirable (unfriendly) perhaps due to the fact that the winning team took too many risks and ‘skimped’ on safety regulations.
What could the public sector do to decrease the likelihood of such an unfriendly discovery?
In the following sub-sections, four public policy initiatives that emanates from the model are discussed: (1) introducing an intermediate prize, (2) using public procurement of innovation, (3) taxing an AGI, and (4) addressing patenting by AI.

#### 4.2.1 Introducing an intermediate prize

One drastic measure would be to prohibit altogether teams (firms) to work towards an AGI, declaring the existential risk to humanity (as was discussed in Sect. 2) to be the overriding constraint. This seems, however, not to be feasible.
The alternative is then not to prohibit the race, but to restrict the number of teams that compete in the race and to incentivize these teams to invest more in pursuing a quality, friendly, AGI. Given the difficult challenge that AGI poses, Sect. 3.1 has shown that, in any case, only the most competitive teams will compete: at present, in the world, there may, perhaps, be only half a dozen or so teams that could seriously compete for an AGI.
Keeping this competitive, and even raising the bar and incentivizing such teams to invest more in finding a dominant AGI, the public sector could introduce second prizes, that is prizes for intermediate results (i.e., advanced, but not dominating AIs). According to the model presented in this paper, this will increase the amount of resources invested to maximize success probability p. In doing so, it will either reduce the number of teams who could afford to participate and/or increase the amount of investment. This will help to reduce the control and political problems characterizing AI.

#### 4.2.2 Public procurement of innovation

How could the public sector in practice introduce an intermediate prize? It is proposed here that the public procurement of innovation can be a useful instrument in this regard, and moreover one that has so far been neglected in the control or alignment of AI. Public procurement of innovation could attempt to steer AGI in a friendly direction by requiring that certain constraints be engineered into the AI, and by assisting the development of complementary technologies.
As far as the engineering of constraints into AI is concerned, the two key questions are: what constraints? and how to engineer these into AI?
Regarding the first question, Chalmers (2010, p.  31) discusses two types of constraints that will be important: internal constraints, which refers to the internal program of the AGI, wherein its ethical values can be encoded, for instance, in giving it reduced autonomy or prohibiting it from having its own goals; and external constraints, which refers to limitations on the relationship between humans and AGI for instance in dis-incentivizing the development of AGI that replaces human labor and incentivizing the development of AGI that enhances human labor, and in trying to first create a AGI in a virtual world without direct contact with the real world (although Chalmers (2010) concludes that this may be very difficult and, perhaps, even impossible to ensure).
Chalmers (2010) suggests that the internal constraints on an AGI could be fashioned through amongst others the method by which humans build an AGI. If an AGI is based on brain emulation rather than non-human data learning systems as is primary the current case, it may end up with different values, perhaps more akin to human values. In addition, if values are established through allow the AGI to learn and evolve, then initial conditions as well as the punishment/reward system for learning would be important to get right at the start. Care should be taken, however, to remove human biases from AGI, especially when they learn from data created by biased humans. Concerns have already been raised about AI reinforcing stereotypes (Cockburn et al. 2017).
Regarding the second question, it can be proposed that public procurement of innovation considers learning from the previous examples where the public sector attempted to steer technology, in particular where coordination and transparency are important outcomes. Two related approaches spring here to mind, namely the concept of Responsible Innovation (RI) [see, for instance, Foley et al. (2016)] and the value sensitive design (VSD) framework [see, for instance, Johri and Nair (2011) and Umbrello (2019)]. Regarding the latter, Umbrello (2019, p.  1) argues that VSD is a ‘potentially suitable methodology for artificial intelligence coordination between the often-disparate public, government bodies, and industry’. Thus, the constraints that were mentioned may be best built into AI applications if public procurement takes into consideration that the role of engineers and programmers are critical ‘both during and after the design of a technology’ (Umbrello 2019, p.  1). See also Umbrello and De Bellis (2018) for a theoretical case and Johri and Nair (2011) for an application to the case of the development of an ICT system in India.
In this regard, a further policy implication that emanates from the model in this paper is that it may be important to promote complementary inventions in AI. This could also be done through public procurement of innovation, where the needed coordination could be better fostered. For instance, other complementary innovations to stimulate may be in technologies that enhance human intelligence and integrate human and artificial intelligence over the longer term. Chalmers (2010) speculates that, once humans live in an AGI world, the options will be either extinction, isolation, inferiority, or integration of humans and AGIs.
A second role for public procurement of innovation, in addition to helping with the engineering of constraints into AI, is to help generate complementary innovations. This can be done, for instance, by stimulating research into how ICT can enhance human biology, and, perhaps, even dispense with it completely, may be needed, for instance in genetic engineering and nanotechnology. In particular, projects that study the challenges in and consequences of uploading brains and/or consciousness onto computers, or implant computer chips and neural pathways into brains, have been gaining traction in the literature and popular media, and form the core agenda of transhumanism (O’Connell 2017).
A strong argument for public procurement rests on its ability to coordinate the search for an AGI, and thus avoid excess competition, as suggested for example by the EU legal provisions on ‘pre-commercial procurement of innovation’ (European Commission 2007), as well as on the EU ‘innovation partnership’ (European Commission 2014). In particular, the ‘innovation partnership’ explicitly encourages a collaborative agreement between contracting authorities and the firms selected to develop an innovative solution.
The case for public procurement of AGI innovation is made stronger by the fact that because an AGI is a public good of the single-best effort type, a government coalition, such as the EU should drive the development, rather than risk, it being developed by the private tech-industry. In essence, this would boil down to the nationalization of AGI with the added advantage that the danger of the misuse of AGI technology may be reduced, see Floridi (2018) and Nordhaus (2015). It may also prevent private monopolies to capture all the rents from AGI innovations (Korinek and Stiglitz 2017).

#### 4.2.3 Taxation

A third policy proposal from the model presented in this section is that the government announce the introduction of a tax rate $$0<t<1$$, on the team that would find the dominant AGI, with t depending on the extent to which the AGI is unfriendly. The taxation policy would, thus, be calibrated by the government in such a way that for a friendly AGI the tax rate t is low and higher for unfriendly AGI. For example, if $$t=1$$ for the most unfriendly solution, then, in general, the tax rate could be defined as follows:
\begin{aligned} t(f)=1-f, \end{aligned}
where $$0\leq f \leq 1$$ is a numerical indicator set by the government to measure the friendliness of the AGI solution, with $$f=0$$ indicating the most undesirable solution and $$f=1$$ the most desirable one. In this case, for team i the expected profit is as follows:
\begin{aligned} E\Pi _i = (1-t)a_i\left( \frac{x_i}{b_i+x_i+x_j}\right) -c_ix_i, \end{aligned}
(18)
with the competition coefficient becoming $$\delta _i = \frac{(1-t)a_i}{c_i} - b_i < \rho _i$$, so that the amount of resources invested and, accordingly, the success probability of the AGI dominant application would decrease. Notice that $$\delta _i> 0$$ if:
\begin{aligned} t< 1- \frac{b_ic_i}{a_i}. \end{aligned}
(19)
This implies that, for a large enough tax rate, teams could be completely discouraged to pursue investing in finding such AGI dominant application. The introduction of a tax rate is equivalent to an intermediate outcome defined now as $$t =-\frac{\alpha {d}_i}{a_i}$$. In this case, $$\alpha$$ can be interpreted as an additional (random) component of the cost, which can only take place probabilistically.
With a high enough tax rate, the effect could be seen as equivalent of nationalizing the AGI. A combination of a high tax rate on an unfriendly AGI together with the public procurement of a friendly AGI that aim to establish a (government-lead) coalition to drive the development of AGI may be the more pertinent policy recommendation to emerge from our analysis, given that much R&D in AI currently tends to be open (and may be given further impetus through the public procurement process) (Bostrom 2017). With more information about the capabilities of teams, including their source codes, data and organizational intent known, the ‘more the danger [of an unfriendly AGI] increases’ (Armstrong et al. 2016, p.  201).
One final but important remark to make with respect to the taxation of AI is that, in the afore-going, the treatment of taxation has been as if there is only a single government and that the AI arms race occur in one country. In a globalized economy where there are tax havens, tax competition, and loopholes, it is even proving difficult for governments to tax ‘old-economy’ firms. What would ultimately be needed would be global coordination of taxation and regulation of AI. This is recognized, for instance, in the ‘Strategy of New Technologies’ adopted by the United Nations Secretary-General, who in reference to technologies such as AI states that ‘collective global responses are necessary’ (United Nations 2018, p.  10). While the principle of global coordination of AI regulation and taxation is clear, practically over the short-term at least, as the vast bulk of advanced research on AI is conducted in only a handful of countries [see WIPO (2019)], the need for global coordination is perhaps not acute.

#### 4.2.4 Addressing patenting by AI

A finally policy recommendation that can be derived from the model presented in Sects. 3 and 4.1 is that patent law and the legal status of AGI inventions will need to be amended to reduce the riskiness of AGI races. In this respect, the World Economic Forum (WEF 2018) has warned that because an AGI will be able to innovate, the firm that invents the first AGI will enjoy a huge first-mover advantage if the innovations made by the AGI will enjoy patent protection. Others, such as Jankel (2015), have been more dismissive of the potential of AI generating truly original and disruptive innovations. The debate is, however, far from settled.
In terms of the model presented, patent protection may raise the returns from investing in a dramatic fashion and will raise the number of teams competing. This is a topic that, however, needs more research and more careful modeling and is left for future research.

## 5 Concluding remarks

Steering the development of an artificial general (or super) intelligence (AGI) may be enormously important for future economic development, in particular, since there may only be one chance to get it right (Bostrom 2014). Even though current AI is nowhere close to being an AGI and does not pose any existential risks, it may be prudent to assume that an arms race for such a technology may be underway or imminent. This is because the economic gains to whichever firm or government lab invents the worlds first AGI) will be immense. Such AGI races could, however, be very detrimental and even pose an existential threat to humanity if it results in an unfriendly AI.
In this paper, it was argued that any race for an AGI will exacerbate the dangers of an unfriendly AI. An all-pay contest model was presented to derive implications for public policy in steering the development of an AGI towards a friendly AI, in other words address what is known in the AI research literature as the control and political problems of AI.
It was established that in a winner-takes-all race for developing an AGI, where players must invest in R&D, only the most competitive teams will participate. This suggests that, given the difficulties of creating an AGI, the degree of competition in the race, as reflected by the number of competing teams, is unlikely ever to be very large. This seems to be reflected in current reality, as the current number of feasible teams able to compete in an AGI race is quite low at around half a dozen or so.
It was also established that the intention (or goals) of teams competing in an AGI race as well as the possibility of an intermediate outcome (‘second prize’) may be important. Crucially, there will be more competitors in the race if the most competitive firm has objective and the probability of profit maximization rather than success, and if some intermediate result (or second prize) is possible, rather than only one dominant prize. Moreover, the possibility of a second prize is showed to raise the probability of finding the dominant AGI application, and, hence, will give more urgency to public policy addressing the control and political problems of AI.
Given that it is infeasible to ban an AGI race, it was shown in this paper that the danger of an unfriendly AGI can be reduced through a number of public policies. Specifically, four public policy initiatives were discussed: (1) introducing an intermediate prize (2) using public procurement of innovation, (3) taxing an AGI, and (4) addressing patenting by AI.
These public policy recommendations can be summarized by stating that, by taxing AI and by publicly procuring an AGI, the public sector could reduce the pay-off from an AGI, raise the amount of R&D that firms need to invest in AGI development, and coordinate and incentivize co-operation. This will help to address the control and political problems in AI. Future research is needed to elaborate the design of systems of public procurement of AI innovation and for appropriately adjusting the legal frameworks underpinning high-tech innovation, in particular dealing with patenting by AI.

## Acknowledgements

We are grateful to participants at workshop, seminars, and meetings in Aachen, Brighton, and Utrecht for their many helpful comments on earlier versions of this paper, in particular Ramona Apostol, Tommaso Ciarli, Stephan Corvers, Geraint Johnes, Thomas Kittsteiner, Oliver Lorz, Marion Ott, Frank Piller, Francesco Porpiglia, Anne Rainville, Erik Stam, and Ed Steinmueller. We also want to thank two anonymous referees for taking the time to read our paper, and for their valuable comments. All errors and omissions are ours alone.

## Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
print
DRUCKEN
Anhänge

## Appendix 1

With two teams, it is possible to suggest a proof which could be graphically visualized. Suppose that $$\rho _1 <{\rm max}(0,\rho _2)$$. It follows that team 1’s best response is $$x_1=B_1 (x_2)=0$$ if $$\rho _1 \leq x_2$$ and $$x_1=B_1 (x_2)=\rho _1 - x_2$$, if otherwise.
when $$\rho _1> x_2$$ can be written as $$x_2 = \rho _1 - x_1$$. Then, it follows immediately that team 2’s best response is $$x_2=B_2 (x_1)=0$$ if $$\rho _2 \leq x_1\rho _2 - x_1$$ and $$x_2=B_2 (x_1)=\rho _2-x_1$$, if otherwise. This response can meet team 1’s best response only at $$x_1=\rho _1$$ and $$x_2=0$$.
Analogously, if $$\rho _2> {\rm max}(0,\rho _1)$$, then the two best replies meet only at $$x_1=0$$ and $$x_2=\rho_2$$. Finally, if $$\rho _1=\rho =\rho _2$$ the two best replies overlap along the segment $$x_2=\rho -x_1$$ and so any pair $$(x_1=x; x_2=\rho -x)$$ with $$0\leq x \leq \rho$$ is a Nash equilibrium of the game.

## Appendix 2

Suppose that $$\rho _1=\rho _2=\ldots =\rho _k= \rho> \rho _{k+1}\geq\ldots\geq\rho _n$$, with $$1\leq k \leq n$$ are the competition coefficients of the n teams, and consider profile
\begin{aligned} z= (x_1,x_2,\ldots ,x_k, x_{k+1}=0, x_{k+2}=0,\ldots ,x_n=0) \end{aligned}
with $$x_i\geq 0$$ for all $$i=1,2,\ldots ,n$$ and $$\Sigma _ix_i=\rho$$.
It is easy to see that the profile is a Nash equilibrium by simply checking that each component is best reply against the others. Indeed, consider team 1, and notice that the argument will be identical for any team i with $$1< i <k+1$$. If $$\Sigma _{i=2}x_i < \rho$$ and $$x_{k+1}= 0, x_{k+2}=0,\ldots ,x_{n}=0$$, then $$x_{-1} = \Sigma _{i=2}x_i < \rho$$ and its best reply would be $$x_1=\rho -x_{-1}$$, so that $$\Sigma _ix_i=\rho =\Sigma _ix_i$$ .
Consider now any team $$i=k+1$$; the same argument will hold for all $$i>k+1$$. In this case, $$x_{-(k+1)}=\Sigma _{i\neq(k+1)}$$, and so, team $$(k+1)$$’s best response would be $$x_{k+1}=0$$, which proves the result.

## Appendix 3

Suppose team 1’s best response is as follows:
\begin{aligned} x_1=B_1 (x_2)=\sqrt{\frac{a_1}{c_1}(b_1+x_2)}-(b_1+x_2). \end{aligned}
Because when $$\rho _1> 0$$ at $$x_2 = 0$$, it is $$0 < B_1 (0) = \sqrt{\frac{a_1}{c_1}b_1}-b_1$$, and since
\begin{aligned} \frac{{\rm d}^{2} B_1 (x_2 )}{{\rm d}x_2^{2}} = - \frac{1}{4}\left( \frac{a_1}{b_1}\right) ^{2} \left( \frac{a_1}{b_1}\right) (b_1+x_2)^{\frac{-3}{2} }< 0, \end{aligned}
then $$B_1 (x_2 )$$ is concave in $$x_2$$ with $$B_1 (x_2 )=0$$ at $$x_2=-b_1$$ and $$x_2=\rho _1$$. Therefore, if $$\sqrt{\frac{a_1}{c_1}b_1}-b_1\geq max(0,\rho _2)$$ it follows immediately that team 2’s best response is
$$x_2=B_2 (x_1)=0$$ if $$\rho _2 \leq x_1$$, and $$x_2=B_2 (x_1)=\rho _2-x_1$$, if otherwise.
This will match $$B_1 (x_2)$$ only at $$(x_1=\sqrt{\frac{a_1}{c_1}b_1 -b_1};\,x_2=0$$, which is the unique Nash equilibrium pair of investments. However, if $$0<\sqrt{\frac{a_1}{c_1}b_1 -b_1}< \rho _2$$, then the two best response match at the unique point $$(x_1=\rho _2-x_2;\, x_2=(\frac{\rho _2+b_1)^2 c_1}{a_1}) -b_1)$$, which is the only Nash equilibrium.
Fußnoten
2
‘Deep-learning methods are representation-learning methods with multiple levels of representation, obtained by composing simple but non-linear modules that each transform the representation at one level (starting with the raw input) into a representation at a higher, slightly more abstract level higher layers of representation amplify aspects of the input that are important for discrimination and suppress irrelevant variations’ (LeCun et al. 2015, p. 436).

3
For the sake of clarity: with the words ‘AGI race’ in this paper is meant a competition or contest between various teams (firms, government labs, and inventors) to invent the first AGI. It does not refer to a convention ‘arms’ race where opposing forces accelerate the development of new sophisticated weapons systems that may utilize AI, although there is of course concern that the AGI that may emerge from a race will be utilized in actual arms races to perfect what is known as Lethal Autonomous Weapons (LAW) [see Roff (2014)].

4
As Evans (2017, p.  221) point out ‘Kurzweil’s vision for the Singularity is reminiscent of the early twenty-century Christian mystic Pierre Teilhard de Chardin, who imagined the material universe becoming progressively more animated by spiritual ecstasy’.

5
Webb et al. (2018, p.  5) document ‘dramatic growth’ in patent applications at the USPTO in AI fields like machine learning, neural networks, and autonomous vehicles. For instance, the number of annual patent applications for machine learning inventions increased about 18-fold between 2000 and 2015.

6
Worldwide investment into AI start-ups increased tenfold from USD 1.74 billion in 2013 USD 15.4 billion by 2017 (Statista 2018).

7
One of the worlds largest AI start-ups in recent years is a Chinese company called SenseTime, who raised more than USD 1.2 billion in start-up capital over the past 3 years. The company provides facial-recognition technology that is used in camera surveillance (Bloomberg 2018).

8
See the National Science and Technology Council (2016).

9
A survey on the economic impacts of AI, on, for instance, jobs, inequality, and productivity, is contained in Naudé (2019).

10
Hence ‘Moore’s Law of Mad Science: every 18 months, the minimum IQ necessary to destroy the world drops by one point’ (Yudkowsky 2008, p.  338).

11
This does not, however, take into account Chinese firms such as Tencent and Alibaba, both whom have been doing increased research into AI. Still, the general conclusion is that the number of serious contenders for the AGI prize is no more than half a dozen or so.

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Titel
The race for an artificial general intelligence: implications for public policy
verfasst von
Wim Naudé
Nicola Dimitri
Publikationsdatum
22.04.2019
Verlag
Springer London
Erschienen in
AI & SOCIETY / Ausgabe 2/2020
Print ISSN: 0951-5666
Elektronische ISSN: 1435-5655
DOI
https://doi.org/10.1007/s00146-019-00887-x

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