We study whether local economic conditions in different areas have an impact on the magnitude and direction of the concentration process of a banking industry. By using probit and count data (ZIP) models to study the consolidation of the Italian banking sector in the second half of the 1990s, we...

In this article, we discuss the implementation of Andrews’s (1988a, Journal of Econometrics 37: 135–156; 1988b, Econometrica 56: 1419–1453) chisquared goodness-of-fit test as a postestimation command. The new command chi2gof reports the test statistic, its degrees of freedom, and its p-value....

I study whether the pricing strategies of competing duopolists in the early US cellular telephone industry can be considered strategic complements or substitutes. In order to do so, I present a multivariate count data regression model that is suitable to test for the existence of strategic...