Review of Economic Studies Vol. 51 No. 2 1984

The Identifiability of the Proportional Hazard Model

James J. Heckman^1,2; Burton H. Singer^2,3

¹ University of Chicago · ² National Opinion Research Center · ³ Columbia University

Abstract

This paper presents new identifiability conditions for the Cox proportional hazard model for duration data when unobserved person specific variables are present. We compare our conditions with those presented by Elbers and Ridder. We also present identifiability conditions for a rich class of parametric hazard models without regressor variables.

DOI

10.2307/2297689

Volume

51

Issue

2

Pages

231

Sources

openalex crossref