This paper considers a dynamic matching model with imperfectly observable worker effort as in Shapiro and Stiglitz (1994). In our economy the no-shirking condition endogenously imposes real wage rigidity on the matching market. This generates "contractual fragility" and inefficient separations...

As Posner (1997) has observed, when individuals in a relationship can commit to imposing costs upon each other then efficient behavior in the absence of law is possible. The question is whether efficient norms of behavior evolve endogenously in a population. We show that in a standard hold up...

We have developed an agent-based computational model, extension of an analytical model1 that studies the structure of coalitions of B-to-C web sites, when Internet buyers incur search costs for finding the good that matches their preferences, and coalitions of sites reduce this cost through...

This paper provides formulae for computing perturbation method approximations of unconditional variances of variables in nonlinear DSGE models. Spurious higher order terms that creep into multi-step ahead forecasts can produce explosive time paths frustrating traditional approaches to estimating...

This paper characterizes the optimal long-run rate of inflation, consistent with an occasionally binding zero lower bound on nominal interest rates, in a stochastic New Keynesian sticky-price model calibrated to the U.S. economy. This may serve to inform discussions on the design of an...

Though multivariate GARCH models are widely used in empirical research, their computational aspects still represent a major hurdle, especially when these specifications are introduced in structural models. One such extension namely the simultaneous equations model (SEM) with GARCH errors was...

This paper studies a Monte Carlo algorithm for computing distributions of state variables when the underlying model is a Markov process. It is shown that the $L_1$ error of the estimator always converges to zero with probability one, and often at a parametric rate. A related technique for...

The paper deals with the efficient computation of general equilibrium models with a continuum of heterogenous agents. It compares an improved version of the Krusell-Smith algorithm to a backward-induction algorithm. The Krusell-Smith algorithm I use in the paper modifies the original algorithm...