In a generalized-least-squares (GLS) regression of mean returns on betas, the slope and R-squared are determined uniquely by the mean-variance location of the market index relative to the minimum-variance boundary. In contrast to ordinary-least-squares, GLS gives a zero slope only if the mean...

This paper develops a continuous-time pure-exchange model to study the dynamic consumption-portfolio problem of an agent who acts as a non-price-taker, and to analyze the implications of his behavior on equilibrium security price dynamics. The non-price-taker is modeled as a price leader in all...

The paper is concerned with time-consistency problems caused by monetary policy in an open economy. The temptation to generate surplus inflation is shown to depend positively on the amounts of nominal debt issued by the government or issued by individuals. Private debt matters, because...

In this paper, we test the random walk hypothesis for weekly stock market returns by comparing variance estimators derived from data sampled at different frequencies. The random walk model is strongly rejected for the entire sample period (1962-1985) and for all sub-periods for a variety of...

This paper evaluates the power of multivariate tests of the Capital Asset Pricing Model. The results indicate that when employing an unspecified alternative hypothesis, the ability of the tests to distinguish between the CAPM and other pricing models is poor. An upperbound is derived for the...