In the social learning model of Banerjee [1] and Bikhchandani, Hirshleifer and Welch [2] individuals take actions sequentially after observing the history of actions taken by the predecessors and an informative private signal. If the state of the world is changing stochastically over time during...

We study aggregate equilibrium dynamics of a frictional labor market where firms post employment contracts and workers search randomly on and off the job for such contracts, while the economy is hit by aggregate productivity shocks. Our exercise provides the first analysis of aggregate dynamics...

This paper presents an analysis of moral hazard in On-the-Job Search (OJS) in an equilibrium setting. In a frictional labor market, when an employee receives an outside offer, her employer is naturally tempted to compete against it to save the cost of hiring a replacement. Casual observation in...

Recessions are times of increased uncertainty and volatility at the micro level. This widely documented empirical pattern has been interpreted as the effect of uncertainty shocks, mediated by various frictions, on aggregate economic activity. We explore the hypothesis that the causation runs the...

We study the design of optimal incentives in a two-player dynamic contest. Two players continuously spend costly effort to attain a score lead, which is also affected by noise. The first player to reach a predetermined score difference (finish line) wins a prize. We focus on the choice of the...

We study employment reallocation across heterogeneous employers through the lens of a dynamic job-ladder model, where more productive employers spend more hiring e�ort and are more likely to succeed in hiring because they offer more. As a consequence, an employer's size is a relevant proxy for...

Using data from the Survey of Income and Program Participation (SIPP) covering 1990-2011, we document that a surprisingly large number of workers return to their previous employer after a jobless spell and experience more favorable labor market outcomes than job switchers. Over 40% of all...

We study equilibrium wage and employment dynamics in a class of popular search models with wage posting, in the presence of aggregate productivity shocks. Firms offer and commit to (Markov) contracts, which specify a wage contingent on all payoff-relevant states, but must pay equally all of...