A Generalized Control Function Approach to Production Function Estimation

Ulrich Doraszelski and Lixiong Li

Papers from arXiv.org

Abstract: We develop a generalized control function approach to production function estimation. Our approach accommodates settings in which productivity evolves jointly with other unobservable factors such as latent demand shocks and the invertibility assumption underpinning the traditional proxy variable approach fails. We provide conditions under which the output elasticity of the variable input -- and hence the markup -- is nonparametrically point-identified. A Neyman orthogonal moment condition ensures oracle efficiency of our GMM estimator. A Monte Carlo exercise shows a large bias for the traditional approach that decreases rapidly and nearly vanishes for our generalized control function approach.

Date: 2025-11, Revised 2025-12
New Economics Papers: this item is included in nep-eff
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