This paper considers the problem of optimal unemployment insurance in a moral hazard framework. Unlike existing literature, unemployed workers can secretly participate in a hidden labor market; as a consequence, an endogenous lower bound for promised utility preventing "immiserization" arises....

Since the probability of finding a job is affected not only by individual effort but also by the aggregate state of the economy, designing unemployment insurance payments conditional on the business cycle could be valuable. This paper answers a fundamental question related to this issue: How...