Abstract
Most economists agree in their view of small and medium-sized enterprises, or small businesses (SMEs), as a marginal scientific subject. They may go so far as to ignore them, either because they think these economic units do not lend themselves to conventional economic studies — studies which, for instance, take into account the “sacred cow” theory of economies of scale — or because they see them as being not really different from big businesses.
However, at least a few economists have recognized, first, the many characteristics differentiating SMEs from big firms, and second, their increasing importance in terms of numbers and job creation within economies. Among these few, Schumpeter was one of the first to show the importance of entrepreneurs and SMEs as the main variable of change in an economy. Simon and Lucas also explained the difference between small and big firms through the differing abilities required by managers to run them. Penrose looked at the question from another point of view by highlighting the interstices taken up by SMEs to fulfil needs that cannot be fulfilled by bigger units. Critics of the theory of economies of scale showed that such economies may be offset by a number of diseconomies, thus justifying the efficiency of many SMEs. More recently, Mills and Schumann suggested that SMEs compensate for their lack of economies of scale by their production flexibility, particularly in today's turbulent economy.
The limits of traditional economic theory are clearly demonstrated by the fact that it does not take account of all these theories, concepts and ideas. It thus neglects a number of important economic phenomena, including the persistence and current expansion of SMEs. Consideration of such phenomena may lead to the development of a new economic theory based on the concepts of instability and contingency, together with the behaviour of entrepreneurs and small firms, thus tending to contradict, in particular, the concept of equilibrium in conventional economic theory.
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A first version of this paper has been presented as invited speaker at the symposium of TETRA Group at Lyon, France, 30–31 May 1990. I thank the colleagues Fritz Rieger, Frances Solé Parrellada, Jacques Filion and the two referees for their very interesting suggestions on a preliminary second version.
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Julien, P.A. Small businesses as a research subject: Some reflections on knowledge of small businesses and its effects on economic theory. Small Bus Econ 5, 157–166 (1993). https://doi.org/10.1007/BF01531912
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DOI: https://doi.org/10.1007/BF01531912