We investigate how banking market competition, informational opacity, and sensitivity to shocks have changed over the last three decades by examining the persistence of firm-level rents. We develop propagation mechanisms with testable implications to isolate the sources of persistence. Our analysis suggests that different processes underlie persistence at the high and low ends of the performance distribution. Our tests suggest that impediments to competition and informational opacity continue to be strong determinants of persistence; that the reduction in geographic regulatory restrictions had little effect on competitiveness; and that persistence remains sensitive to regional/macroeconomic shocks. The findings also suggest reasons for the recent record profitability of the industry.

We provide evidence on the validity of the it conglomeration hypothesis versus the strategic focus hypothesis for financial institutions using data on U.S. insurance companies. We distinguish between the hypotheses using profit scope economies, which measure the relative efficiency of joint versus specialized production, taking both costs and revenues into account. The results suggest that the conglomeration hypothesis dominates for some types of financial service providers and the strategic focus hypothesis dominates for other types. This may explain the empirical puzzle of why joint producers and specialists both appear to be competitively viable in the long run. Journal of Economic Literature Classification Numbers: G22, G28, G34, L23, L89.