What market structure emerges when market participants can choose the rate at which they contact others? We show that traders who choose a higher contact rate emerge as intermediaries, earning profits by taking asset positions that are misaligned with their preferences. Some of them, middlemen,...

We develop a quantitative framework for exploring how individuals trade off the utility benefit of social activity against the internal and external health risks that come with social interactions during a pandemic. We calibrate the model to external targets and then compare its predictions with...

We develop a quantitative framework for exploring how individuals trade off the utility benefit of social activity against the internal and external health risks that come with social interactions during a pandemic. We calibrate the model to external targets and then compare its predictions with...

We use a conventional dynamic economic model to integrate individual optimization, equilibrium interactions, and policy analysis into the canonical epidemiological model. Our tractable framework allows us to represent both equilibrium and optimal allocations as a set of differential equations...

How do noncompete agreements between workers and firms affect wages and employment in equilibrium? We build a tractable framework of wage posting with on-the-job search and large employers that provides a natural laboratory to assess anti-competitive practices in the labor market. We...

We model and analyze employer cartels that fix wages by committing to a wage ceiling. The setting is a frictional labor market with large employers that compete for workers via posted wages. Wage fixing reduces competition both inside and outside the cartel, leading to market-wide wage...

We build a model where firm size is a source of labor market power. The key mechanism is that a granular employer can eliminate its own vacancies from a worker's outside option in the wage bargain. Hence, a granular employer does not compete with itself. We show how wages depend on employment...