This paper deals with nonparametric inference for second order stochastic dominance of two random variables. If their distribution functions are unknown they have to be inferred from observed realizations. Thus, any results on stochastic dominance are in uenced by sampling errors. We establish...

This paper suggests a method of depicting mobility processes of income or earnings. It makes use of nonparametric quantile regression based on bivariate kernel density estimation. The method is illustrated with a comparison of German and US income mobility. --