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Verdoorn's law is named after Dutch economist, Petrus Johannes Verdoorn. In economics, this law pertains to the relationship between the growth of output and the growth of productivity. According to the law, faster growth in output increases productivity due to increasing returns. Verdoorn (1949, p. 59) argued that “in the long run a change in the volume of production, say about 10 per cent, tends to be associated with an average increase in labor productivity of 4.5 per cent.” The Verdoorn coefficient close to 0.5 is also found in subsequent estimations of the law. Nicholas Kaldor (1966, p. 289) reports a 0.484 coefficient.
Verdoorn's law differs from the “the usual hypothesis … that the growth of productivity is mainly to be explained by the progress of knowledge in science and technology” (Kaldor, 1966, p. 290), as it typically is in neoclassical models of growth (e.g. the Solow model). Verdoorn's law is usually associated with cumulative causation models of growth, in which demand rather than supply determine the pace of accumulation.
Nicholas Kaldor and Anthony Thirlwall developed models of export-led growth based on Verdoorn's law. For a given country an expansion of the export sector may cause specialisation in the production of export products, which increase the productivity level, and increase the level of skills in the export sector. This may then lead to a reallocation of resources from the less efficient non-trade sector to the more productive export sector, lower prices for traded goods and higher competitiveness. This productivity change may then lead expanded exports and to output growth.
Thirlwall (1979) shows that for several countries the rate of growth never exceeds the ratio of the rate of growth of exports to income elasticity of demand for imports. This implies that growth is limited by the balance of payments equilibrium. This result is known as Thirlwall's law.
Sometimes Verdoorn's law is called Kaldor-Verdoorn's law or effect.
- "Verdoorn's Law". Retrieved 2009-06-17. sourced from Verdoorn, P J (June 1980), "Verdoorn's Law in Retrospect: A Comment", Economic Journal (Royal Economic Society) 90 (358): 382–85
- Kaldor, N. (1966). Causes of the Slow Growth in the United Kingdom. Cambridge: Cambridge University Press.
- Thirlwall, A. P. (1979). The balance of payments constraint as an explanation of international growth rate differences. Banca Nazionale del Lavoro Quarterly Review, March.
- Verdoorn, J. P. (1949), “On the Factors Determining the Growth of Labor Productivity,” in L. Pasinetti (ed.), Italian Economic Papers, Vol. II, Oxford: Oxford University Press, 1993.
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