This article synthesizes several existing economic perspectives on the incentives for and consequences of media consolidation. Because of the two-sided nature of media markets, media mergers may lead to unexpected effects, which may not be deduced from common notions of industrial economics. We...

This paper derives a new method for comparing the weak-form efficiency of markets. The author derives the formula of the Sharpe ratio from the ARMA-GARCH model and finds that the Sharpe ratio just depends on the coefficients of the AR and MA terms and is not affected by the GARCH process. For...