Abstract
This paper critically examines the hypothesis that layoffs are involuntary in implicit labour contracts because they are used by employers to punish inferior worker performance. In repeated moral hazard situations, workers typically bear risk associated with whether they are chosen to be laid off even though the latter is uninformative about previous effort choices and wages are performance-contingent. However the hypothesis is unsatisfactory as optimal contracts involve involuntary retentions rather than involuntary layoffs in a wide variety of circumstances.

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