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Increasing returns, imperfect competition and factor prices
Epifani, Paolo; Gancia, Gino
Universitat Pompeu Fabra. Departament d'Economia i Empresa
We show how, in general equilibrium models featuring increasing returns, imperfectcompetition and endogenous markups, changes in the scale of economic activity affectincome distribution across factors. Whenever final goods are gross-substitutes (gross-complements), a scale expansion raises (lowers) the relative reward of the scarce factoror the factor used intensively in the sector characterized by a higher degree of product differentiation and higher fixed costs. Under very reasonable hypothesis, our theory suggests that scale is skill-biased. This result provides a microfoundation for the secular increase in the relative demand for skilled labor. Moreover, it constitutes an important link among major explanations for the rise in wage inequality: skill-biased technical change, capital-skill complementarities and international trade. We provide new evidence on the mechanism underlying the skill bias of scale.
Macroeconomics and International Economics
endogenous markups
pro-competitive e¤ect
income distribution
trade models with imperfect competition
wage inequality
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