This paper explores how efficiency promotes the use of structure in language. It starts from the premise that one of language's central characteristics is to provide a means for saying noval things about novel circumstances, its creativity. It is reasonable to expect that in a rich and changing...

This paper designs and implements a Bayesian dynamic latent factor model for a vector of data describing the Iowa economy.

In this paper, the conventional test of the Sharpe-Lintner version of the Capital Asset Pricing Model (CAPM) are reconsidered. The CAPM is formulated as a Seemingly Unrelated Regression (SUR) system with an adding-up restriction. A statistical framework for conducting the conventional tests is...

We develop a new test of a parametric model of a conditional mean function against a nonparametric alternative. The test adapts to the unknown smoothness of the alternative model and is uniformly consistent against alternatives whose distance from the parametric model converges to zero at the...

We develop a business cycle model in which consumption goods, physical capital and human capital are produced in separate sectors.