The Panzar-Rosse model is a widely applied method to assess competitive conduct. In particular, it has been extensively used to analyze the competitive climate in the banking industry. To correct for differences in firm size, many empirical papers estimate a Panzar-Rosse revenue function with...

We use panel data from the EU-25 to estimate the effect of changes in the degree of banking market concentration on the stability of banks by performing separate analyses at the country level and the bank level. The results indicate that the level of analysis matters. Whereas our country-level...

The aggregate Lerner index is a popular composite measure of multi-product banks' market power, based on the assumption that banks' single aggregate output factor is total assets. This study identifies three limitations of the aggregate Lerner index that potentially distort its interpretation as...