My wife Beverlee Tito Simboli and I married in 1962. We have three grown children, Nina, Robert, and Raymond, and three grandchildren, Emily, Anne, and Daniel William. Beverlee is a photographer who is best known for her large-format Polaroid works with industrial and abstract subjects. She is...

This paper investigates the question whether it really matters for microeconometric evaluation studies to take account of the fact that the programmes under consideration are heterogeneous. Assuming that selection into the different sub-programmes and the potential outcomes are independent given...

A new semiparametric proportional hazard rate model is proposed which extends standard models to include a dynamic specification. Two main problems are resolved in the course of this paper. First, the partial likelihood approach to estimate the components of a standard proportional hazard model...

The German Socio-Economic Panel (GSOEP) is an interdisciplinary longitudinal study of private households for the representative analysis and interpretation of social and economic behavior in the Federal Republic of Germany. As a longitudinal survey, the GSOEP primarily aims to collect...

When making decisions, agents tend to make use of decisions others have made in similar situations. Ignoring this behavior in empirical models can be interpreted as a problem of omitted variables and may seriously bias parameter estimates and harm inference. We suggest a possibility of...

The recent availability of large data sets covering single transactions on financial markets has created a new branch of econometrics which has opened up a new door of looking at the microstructure of financial markets and its dynamics. The specific nature of transaction data such as the...