The neoclassical model and the welfare costs of selection

Abstract

This paper embeds firm dynamics into the Neoclassical model in a framework with partially reversible capital and investment distortions, allowing for a simple characterization of the transitional dynamics of economies moving towards greater selection. At equilibrium, aggregate technology is Neoclassical, with the quality of capital and the depreciation rate depending on selection. As investment distortions are corrected, selection increases, and both output per capita and welfare rise at the steady state. However, selection destroys existing production capacities, leading to transitional welfare losses. When calibrated to the US, the model shows that developing countries reducing investment distortions to US levels would experience substantial steady-state welfare gains, though transitional costs could absorb 70% to 76% of these gains. While the associated welfare gains from selection at steady-state are significant, between 10% and 23%, transitional costs largely offset these additional welfare gains.

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JEL codes

Replaces

Fabrice Collard, and Omar Licandro, “The Neoclassical Model and the Welfare Costs of Selection”, TSE Working Paper, n. 21-1246, September 2021.

Reference

Fabrice Collard, and Omar Licandro, “The neoclassical model and the welfare costs of selection”, Review of Economic Dynamics, vol. 57, n. 101284, July 2025.