In recent decades, market power has increased substantially, according to multiple measures that describe industry concentration, mark-ups, and business profitability. While market power can generate benefits, it also raises vexing policy concerns, including the potential for adverse effects on...

We study the aggregate and distributional effects of corporate tax reforms when market power is heterogeneous across sectors and firms. We use a life-cycle model with incomplete markets in which capital and equity do not always move in tandem when corporate tax policy changes. On the one hand,...

We show how corrective taxation can improve the efficiency properties of tradable quotas systems affected by market power. Indeed, when only a subset of firms are price takers while the remaining firms enjoy market power, we show that, if the regulator sets an ad hoc taxation on firms' traded...