The paper surveys various parametric Lorenz curves to be fitted to ground income data in order to obtain an estimate for the Gini measure of inequality. The curves are fitted to 16 sets of empirical income data. The results are compared to the results of the purely nonparametric method (due to...

The effects of option trading at the DTB on the variance of the underlying stocks are examined. We use a new distribution free test being based on the empirical distribution functions. The evidence indicates that stock return variance increased after the introduction of the DTB. This effect can...