We introduce a new two-dimensional measure for the heterogeneity of performance within groups of economic units. This measure accounts both, for the relative performance of the single units of groups and their relative size. We demonstrate that the new measure leads to a much more differentiated...

We analyze the effect of industry, region, and time on new business survival rates by means of a multidimensional approach. The data relate to West German counties in the 1983-2000 period. Survival chances of start-ups tend to be relatively low in industries characterized by a high minimum...