Herfindahl-Hirschman Index (HHI) that measure the concentration of the industry belongs to well-known special indices. The paper is devoted to the sensitivity of the HHI values, which allows simulations of changes in concentration of the relevant market in case of new entry into the market. Let...

Total Factor Productivity (TFP)is often used on the macro-economic level as an indicator of changes in efficiency of a country. In many transition economies TFP is seen to have been negative the last decade of the plan economy and starts increasing and become positive after a (quite a) few years...

The empirical economic growth literature is criticized for its lack ofrobustness. For different definitions of robustness, conclusions vary from 'almost everycorrelation is fragile' to 'a substantial number of explanatory variables are robust.' Were-analyze the empirical results of the economic...