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...

This paper focuses on the exposure of common stocks to inflation risk and assesses the impact of this exposure on portfolio choice. We show that the relation between real stock returns and inflation rates, as well as the parameter uncertainty involved with this relation, has substantial...