Kimberly Clausing (UCLA; Google Scholar) presents Capital Taxation and Market Energy at Toronto as we speak as a part of its James Hausman Tax Legislation and Coverage Workshop Sequence hosted by Benjamin Alarie:

In current a long time, market energy has elevated considerably, as proven by measures that embody trade focus, mark-ups, and enterprise profitability. Whereas market energy can generate advantages, it additionally raises vexing coverage issues, together with the potential for opposed results on labor markets, revenue inequality, and the dynamism of market competitors. The idea of market energy additionally has implications for a way we conceptualize capital revenue, making it necessary to tell apart between regular and above-normal returns to capital. The tax system taxes each forms of returns to capital, however usually imperfectly and incompletely.