We develop generalized indirect estimation procedures that handle equality and inequality constraints on the auxiliary model parameters by extracting information from the relevant multipliers, and compare their asymptotic efficiency to maximum likelihood. We also show that, regardless of the...

We develop generalized indirect estimation procedures that handle equality and inequality constraints on the auxiliary model parameters by extracting information from the relevant multipliers, and compare their asymptotic efficiency to maximum likelihood. We also show that, regardless of the...

This paper attempts to explore whether lagged variables that help predict stock returns are merely proxying for mismeasured risk. Therefore, three different ways of measuring risk are employed (i.e., semiparametric, GARCH, and lagged squared returns). In an application to Japanese data, four key...

The author introduces a new model for time-varying conditional variances as the most general quadratic version possible within the ARCH class. Hence, it encompasses all the existing restricted quadratic variance functions. Its properties are very similar to those of GARCH models but avoids some...