By replacing the unknown random factors of factor analysis with observed macroeconomic variables, the arbitrage pricing theory (APT) is recast as a multivariate nonlinear regression model with across-equation restrictions. ...

Recently, the Federal Trade Commission (FTC) has accused breakfast cereal manufacturers of illegal monopolization (1971). A major basis for the charge is the FTC belief that high advertising expenditures by the companies ...

H. Gregg Lewis, perhaps the father of modern labor economics, died in January of 1992. The comments that follow were written for presentation at a special memorial session, held at the American Economic Association Meeting ...

This paper extends, in an asymptotic sense, the strong and the weaker mean square error criteria and corresponding tests to linear models with non-spherical disturbances where the error covariance matrix is unknown but ...