In this paper we develop a new methodology for finding optimal government policies in economies with heterogeneous agents. The methodology is solely based on three classes of equilibrium conditions from the government's and individual agent's optimization problems: 1) the first order conditions;...

In this paper we develop a general methodology for solving models with heterogeneous agents by projection methods. Our approach is solely based on the functional forms of agents' optimal policy rules and on a functional condition on the endogenous stationary distribution. Solving simultaneously...

We construct a new measure of knowledge capital as an aggregate production factor in the sense of Lucas and employ it in a standard growth and variance accounting exercise. We base this new measure on the available data on educational attainment using the empirically confirmed relationship...