Assuming a Pareto-type distribution of bank sizes, we investigate the effect of changes in Zipf's exponent ([alpha]) and the sample size on the behavior of different concentration indices, such as the 3-bank concentration ratio, the Herfindahl-Hirschman index and the top 5%-concentration ratio....

By assuming a Pareto-type distribution of bank sizes within banking systems, we investigate the effect of changes to Zipf's slope parameter (a) and the sample size to the behaviour of different concentration indexes, such as the 3-bank concentration ratio, the Herfindahl-Hirschman index and the...

This paper investigates the abnormal share return dispersion occurring when companies announce their interim or final earnings. Whereas, prior research has focused on abnormal returns, little attention has been given to investigating the dispersion of the abnormal returns. We find strong...

This paper investigates the abnormal share return dispersion occurring when companies announce their interim or final earnings. Whereas, prior research has focused on abnormal returns, little attention has been given to investigating the dispersion of the abnormal returns. We find strong...

This paper provides the first empirical analysis of the cross-country relationship between a direct measure of competitive conduct of financial institutions and banking system fragility. Using the Panzar and Rosse H-Statistic as a measure for competition in 38 countries during 1980-2003, we...