We examine whether corporate rivals react to industry-specific competition-shocks by increasing product differentiation or, alternatively, by lowering differentiation to capture scale-economies. As rival reactions affect intraindustry cash-flow correlations, these two hypotheses imply...

A defining feature of business cycles is the comovement of inputs at the sectoral level with aggregate activity. Standard models cannot account for this phenomenon. This paper develops and estimates a two-sector dynamic general equilibrium model which can account for this key regularity. My...