In Chapter 1, I study the efficiency properties of competitive search equilibria in economies with informational asymmetries. Employers and workers are both risk-neutral and ex-ante homogeneous. I characterize an equilibrium where employers post contracts and workers direct their search towards...

This thesis includes four essays on the macroeconomic effects of financial market imperfections. The first essay studies the incentives for banks that participate in an interbank market to keep a sufficient level of reserves. It presents a model where, in presence of imperfect insurance against...