Mean-variance optimization provides a framework for constructing portfolios that have minimum risk for a given level of expected return. The required inputs are the expected asset returns, the asset covariance matrix, and a set of investment constraints. While portfolio optimization always leads...

We study the interaction of endogenous growth and Ricardian trade working solely through comparative advantage. The model is built to be consistent with several facts about technical progress, R&D activity, industrial organization, and trade. We obtain a full characterization of the transition...