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IDENTIFICATION OF PAIRED NONSEPARABLE MEASUREMENT ERROR MODELS

Published online by Cambridge University Press:  03 June 2016

Yingyao Hu*
Affiliation:
Johns Hopkins University
Yuya Sasaki*
Affiliation:
Johns Hopkins University
*
*Address correspondence to Yingyao Hu and Yuya Sasaki, Department of Economics, Johns Hopkins University, Wyman Park Building 544E, 3400 N. Charles St, Baltimore, MD 21218; e-mail: yhu@jhu.edu, sasaki@jhu.edu.
*Address correspondence to Yingyao Hu and Yuya Sasaki, Department of Economics, Johns Hopkins University, Wyman Park Building 544E, 3400 N. Charles St, Baltimore, MD 21218; e-mail: yhu@jhu.edu, sasaki@jhu.edu.
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Abstract

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This paper studies the paired nonseparable measurement error models, where two measurements, X and Y, are produced by mutually independent unobservables, U, V, and W, through the system, X = g(U,V) and Y = h(U,W). We propose restrictions to identify the marginal distribution of the common component U and the conditional distributions of X and Y given U. Applying this method to twin panel data, we find the following robust reporting patterns for years of education: (1) self reports are accurate only when the true years of education are 16 or 18, typically corresponding to advanced university degrees in the US education system; (2) sibling reports are accurate whenever the true years of education are 12, 14, 16, and 18, which are typical diploma years.

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Copyright © Cambridge University Press 2016