Noncontractible Heterogeneity in Directed Search


  • Michael Peters

    1. Dept. of Economics, University of British Columbia, 997-1873 East Mall, Vancouver, BC V6T 1Z1, Canada;
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    • I am grateful to Daron Acemoglu, Rob Shimer, and a number of referees for substantive and expositional help. The work on this paper was funded by SSHRC.


This paper provides a directed search model designed to explain the residual part of wage variation left over after the impact of education and other observable worker characteristics have been removed. Workers have private information about their characteristics at the time they apply for jobs. Firms value these characteristics differently and can observe them once workers apply. They hire the worker they most prefer. However, the characteristics are not contractible, so firms cannot condition their wages on them. This paper shows how to extend arguments from directed search to handle this, allowing for arbitrary distributions of worker and firm types. The model is used to provide a functional relationship that ties together the wage distribution and the wage–duration function. This relationship provides a testable implication of the model. This relationship suggests a common property of wage distributions that guarantees that workers who leave unemployment at the highest wages also have the shortest unemployment duration. This is in strict contrast to the usual (and somewhat implausible) directed search story in which high wages are always accompanied by higher probability of unemployment.