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Published in: Small Business Economics 3/2022

15-01-2021

One swallow does not make a summer: episodes and persistence in high growth

Authors: Silviano Esteve-Pérez, Fabio Pieri, Diego Rodriguez

Published in: Small Business Economics | Issue 3/2022

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Abstract

This paper analyzes firms’ episodes (spells) of high growth (HG) using a sample of Spanish manufacturing firms observed over two decades. The use of duration models allows us to investigate the following: (i) the probability of experiencing HG episodes, (ii) persistence in HG, and (iii) the determinants of the transitions in and out of the HG state and whether their impact varies over the business cycle. We find that about half of the firms experience at least one HG episode, but they seldom experience more than one. Moreover, high-growth status is rarely repeated due to high first-year selection. Yet, in subsequent years beyond the first one, the hazard rate from HG status falls substantially. These results suggest an “episodic” nature of HG and further allow us to identify two groups of firms characterized by the following: (i) (relatively) long HG spells and short no high-growth (NHG) spells and (ii) short HG spells and long NHG spells. In addition, some firm and market (demand) characteristics increase the probability of becoming an HG firm and enhancing HG persistence. Finally, during the downturn, the role of younger age and smaller size in explaining HG decreases.

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Appendix
Available only for authorised users
Footnotes
1
Empirical papers have shown that the distribution of firm growth rates is tent-shaped (e.g., Bottazzi and Secchi 2006; Bottazzi et al. 2011). Its “heavy” tails reveal the existence of a reduced group of episodes of fast growth (and other few ones of fast contraction).
 
2
Throughout the paper, we use the terms spell and episode interchangeably.
 
3
The definition of (what constitutes) an HGF is not a trivial issue (Coad et al. 2014); indeed, the choice of the growth metric may well affect the results of the analyses (Delmar et al. 2003; Daunfeldt et al. 2013). The reader is cross-referred to Section 3, in which we introduce the definition of HG employed in this work.
 
4
We also jointly estimate the equations modeling the two types of transitions, allowing for non-zero correlation across the firm-level unobserved variables that affect both transitions.
 
5
See Erhardt (2019, Table 1) for a classification of recent studies along these dimensions.
 
6
The sampling procedure of the ESEE is the following: firms with fewer than 10 employees are excluded from the survey. Firms with 10–200 employees are randomly sampled by two-digit NACE industry and size strata, holding around 4% of the population in 1990. All firms with more than 200 employees were requested to participate, resulting in a participation rate of around 60% in 1990. Important efforts have been made to minimize attrition and annually incorporate new firms with the same sampling criteria as in the base year so that the sample of firms is representative of the Spanish manufacturing sector over time. See https://​www.​fundacionsepi.​es/​investigacion/​esee/​en/​spresentacion.​asp for comprehensive information about the ESEE.
 
7
The ESEE does not provide the number of hours worked by part-time employees, but they are merely 3% of permanent workers.
 
8
In the words of Sutton (1997, p. 40), “Size can be measured in a number of ways […] annual sales, […] current employment, and […] total assets. Though we might in principle expect systematic differences between the several measures, such differences have not been a focus of interest in the literature.”
 
9
Firms in the sample grow either organically or via M&As. For the purpose of this work and to avoid losing the information provided by firms that go through M&As or spin-off procedures, we identify episodes of non-organic growth at the moment in time in which they happen (year t). We consider the pre-episode (up to year t − 1) and post-episode (from year t + 1 onward) units of analysis as two separate spells.
 
10
Admittedly, while our definition resembles Birch’s (1981) definition, an absolute definition may also be used, such as the one proposed by the Eurostat–OECD Manual on Business Demography Statistics (2007). The manual defines an HGF as one with the following attributes: (i) it initially possesses 10 or more employees or has at least four times the national per capita income in annual revenues, and (ii) it experiences average annualized employment or revenue growth of greater than 20% over a 3-year period. While the debate about what constitutes an HGF is nontrivial (Coad et al. 2014), it is beyond the scope of this work. Only for comparison purposes with the definition advocated by the Eurostat–OECD manual, we report that about 3% of firms fulfill the criterion of having a cumulative average growth rate larger than 20% for 3 consecutive years.
 
11
For example, in 2009 (the worst year for employment in Spain), the 90th percentile was 0.0453, which contrasts sharply with the 1998 value of 0.198.
 
12
The NHG state comprises a heterogeneous set of growth episodes (from mildly positive to very negative), gathering a lot of heterogeneity. Some of these episodes may be interesting per se (e.g., the high-decline firms, as suggested by Coad et al. 2014), but exploitation of the heterogeneity within the NHG state is beyond the scope of this work.
 
13
Briefly, we start with an unbalanced panel of firms over 1991–2016. The definition of HGF involves comparing a firm’s annual growth rate with the sample annual growth rate obtained using a 3-year moving average. Therefore, we define HG/NHG states from 1993 to 2015. Furthermore, in the survival analysis, (i) the information in 2015 is only used to determine whether ongoing spells in 2014 end or are right-censored (i.e., continue in 2015); (ii) we focus on “fresh” spells, so ongoing spells in 1993 are dropped. Thus, we end up with 24,947 observations.
 
14
This corresponds to the simple mean of observed durations both for complete and right-censored spells.
 
15
To avoid an odd behavior in the estimated baseline hazard functions due to scarcity of observations spanning longer durations, we right-censor spells of HG longer than 3 years. Likewise, to make the results comparable for the two transitions, we apply the same right-censoring to NHG spells, which is also supported by piecewise estimates of the baseline (not reported, but available from the authors upon request) that suggest no significant differences in hazards across different spell ages.
 
16
However, if unmeasured factors that affect the error term were correlated with our lagged covariates over time, then biased estimators would be obtained. We partly deal with this issue both using a relatively large set of explanatory variables and estimating frailty duration models that account for firm-level unobserved heterogeneity.
 
17
We are grateful to a reviewer for raising this point.
 
18
In the model for the transitions NHG to HG, we cannot reject the existence of unobserved heterogeneity (col. 1 in Tables 3 and 4). Hence, the regression coefficients for this model are defined conditional on the unobserved heterogeneity. Hence, the impact of each covariate holds valid for two spells with an identical frailty term.
 
19
Table C1 in an online appendix reports the full estimates of the columns labeled “Total” for NHG and HG hazards.
 
20
Indeed, while no industry shows a statistically significant difference in explaining persistence in HG, “Leather, fur, and footwear” and “Timber” show, for firms belonging to them, higher probabilities of experiencing an HGE than the reference industry does (“Meat related products”). Conversely, “Printing and publishing,” “Chemicals,” and “Basic metal products” all show lower probabilities of their firms experiencing an HGE in relation to the reference industry.
 
21
The taxonomy followed is a more aggregated version of that provided by Eurostat (http://​ec.​europa.​eu/​eurostat/​statistics-explained/​index.​php/​Glossary:​High-tech_​classification_​of_​manufacturing_​industries). See Table 2 for further details.
 
22
In all the following specifications, we include both year and industry dummies, but we avoid reporting their (consistent) coefficients to save space. Complete tables are available from the authors upon request.
 
23
Indeed, in Section 4.4, we replicate the analysis by measuring firm size with (real) sales and we do find a significant positive association between being and exporter and the probability of shifting from NHG to HG.
 
24
For instance, the decrease in the impact of SP_REP3 on the transition NHG to HG takes place because firms with high hazard rate HG to NHG are selected into repeated NHG spells. The negative correlation between the two transitions leads to a disproportionate presence of firms with low hazard rate NHG to HG in repeated spell category. These firms push down the odds of NHG to HG in SP_REP3 increasing the negative impact (i.e., lower odds ratio) when residual correlation is uncontrolled.
 
25
As previously explained, the duration analysis includes right-censored spells and treats them properly. However, in this complementary analysis, a 1-year HG spell that is right censored could be inadequately assigned to a duration length of 1, while its true duration could be longer than that.
 
26
Column 1 of Table A1, in the Online Appendix, shows the β estimated parameters for a partial proportional odds model with spell length as the dependent variable. Only the dummy variable that measures “high-productivity” firms (PRODUCTIVITYH) fails to meet the proportional odds assumption. Accordingly, the results for both unconstrained coefficients are shown in that case.
 
27
We must bear in mind that this table shows a sizeable reduction in sample size (about 10%) compared with Table 4 due to information requirements associated with calculating the total factor productivity variable. However, as pointed out by one reviewer, the non-linear effect of total factor productivity on the likelihood of experiencing HG (also found when we include both continuous total factor productivity and its square -estimates are not reported for brevity) could suggest the existence of an “optimal level” of productivity. Beyond that level, further growth may destabilize a firm’s organization.
 
28
Sales have been deflated using price variations defined at the firm level. Specifically, the surveyed firms give annual information about markets served (up to five), identifying their relative importance (in percentage) for total sales of the firm. This information allows us to calculate a price index for all markets and for each market, using the proportions with respect to total sales as weights. Average (industry/year) price variations are used for those few firms that do not provide information.
 
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Metadata
Title
One swallow does not make a summer: episodes and persistence in high growth
Authors
Silviano Esteve-Pérez
Fabio Pieri
Diego Rodriguez
Publication date
15-01-2021
Publisher
Springer US
Published in
Small Business Economics / Issue 3/2022
Print ISSN: 0921-898X
Electronic ISSN: 1573-0913
DOI
https://doi.org/10.1007/s11187-020-00443-8

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