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Identification And Estimation In A Correlated Random Coefficients Transformation Model

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  • Zhang, Zhengyu
  • Jin, Zequn
  • Mu, Beili

Abstract

This study examines identification and estimation in a correlated random coefficients (CRC) model with an unknown transformation of the dependent variable, namely $\lambda \left (Y^{*}\right)=B_{0}+X^{\prime }B$ , where the latent outcome $Y^{*}$ may be subject to a certain kind of censoring mechanism, $\lambda (\cdot)$ is an unknown, one-to-one monotone function, and the random coefficients $\left (B_{0},B\right)$ are allowed to be correlated with one or several components of X. Under a conditional median independence plus a conditional median zero restriction, the mean of B is shown to be identified up to scale. Moreover, we show the derivative of the median structural function (MSF) is point identified. This derivative of MSF resembles the marginal treatment effect introduced by Heckman and Vytlacil (2005, Econometrica 73, 669–738). It generalizes the usual average treatment effect in a linear CRC model and coincides with $E(B)$ when $\lambda $ is equal to the identity function; it is invariant to both location and scale normalization on the coefficients. We develop estimators for the identified parameters and derive asymptotic properties for the derivative of MSF. An empirical example using the U.K. Family Expenditure Survey is provided.

Suggested Citation

  • Zhang, Zhengyu & Jin, Zequn & Mu, Beili, 2022. "Identification And Estimation In A Correlated Random Coefficients Transformation Model," Econometric Theory, Cambridge University Press, vol. 38(4), pages 621-688, August.
  • Handle: RePEc:cup:etheor:v:38:y:2022:i:4:p:621-688_1
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    Cited by:

    1. Zhu, Xun & Jin, Zequn, 2023. "Some identification results in a correlated random coefficients sample selection model," Economics Letters, Elsevier, vol. 233(C).

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