skip to content

Faculty of Economics

Journal Cover

Ritz, R. A.

On welfare losses due to imperfect competition

Journal of Industrial Economics

Vol. 62(1) pp. 167-190 (2013)

Abstract: Corporate managers and executive compensation in many industries place significant emphasis on measures of firm size, such as sales revenue or market share. Such objectives have an important—yet thus far unquantified—impact on market performance. With n symmetric firms, equilibrium welfare losses are of order 1/n4, and thus vanish extremely quickly. Welfare losses are less than 5% for many empirically relevant market structures, despite significant firm asymmetry and industry concentration. They can be estimated using only basic information on market shares. These results also apply to oligopsonistic competition (e.g., for retail bank deposits) and strategic forward trading (e.g., in restructured electricity markets).

Keywords: Delegation, forward trading, managerial incentives, market structure, welfare losses.

JEL Codes: D43, D61, L13, L22, L41

Author links: Robert Ritz  

Publisher's Link: http://onlinelibrary.wiley.com/doi/10.1111/joie.12038/abstract



Papers and Publications



Recent Publications


Elliott, M., Golub, B. and Leduc, M. V. Supply Network Formation and Fragility American Economic Review [2022]

Porzio, T., Rossi, F. and Santangelo, G. The Human Side of Structural Transformation American Economic Review [2022]

Ritz, R. Does Competition Increase Pass-Through? Rand Journal of Economics, forthcoming [2023]

Evans, R. A. and Reiche, S. K. When Is a Contrarian Adviser Optimal? American Economic Journal: Microeconomics [2023]