Capital-based business cycle theory identifies monetary mismanagement as a major source of economy-wide distortions in the intertemporal allocation of resources by focusing on the relative-price effects - and the corresponding quantity adjustments - of a monetary disturbance, as compared to tracking the movements in macroeconomic aggregates that conceal those relative-price effects. It thus gives us a superior understanding of the real coupling between the short-run and the long-run macroeconomic pictures and of the nature of business cycles.