In this paper, we consider the goodness-of-fit for checking whether the nonparametric function in a partial linear regression model with missing covariate at random is a parametric one or not. We estimate the selection probability by using parametric and nonparametric approaches. Two score type...

Pension plans and mutual funds represent a substantial part of the welfare systems in both Europe and Spain. One of the most important factors in the choice of a plan or fund is its performance, since if high returns are obtained; the participant will receive higher payments when the contingency...

This paper examines the risk-adjusted performance of mutual funds offered in Germany which exclusively invest in the 'rather new' capital market segment of euro-denominated investment grade corporate bonds. The funds are evaluated employing a single-index model and several multi-index and...

One of the most difficult problems in applications of semiparametric generalized partially linear single-index model (GPLSIM) is the choice of pilot estimators and complexity parameters which may result in radically different estimators. Pilot estimators are often assumed to be root-n...