Towards a Theory of Market Power

This paper analyzes the question of market power. Longstanding definitions and analytical tools are inadequate because they conflate conditions under which a firm has unbeneficial control over its markets (market power) with situations where firms are successful because they are superior in how they serve customers (expanding consumer welfare).

Amazon is not essential, except to the EU’s flawed investigations

Amazon has largely avoided the crosshairs of antitrust enforcers to date (leaving aside the embarrassing dangerous threats of arbitrary enforcement by some US presidential candidates). The reasons seem obvious: in the US it handles a mere 5% of all retail sales (with lower shares in the EU), and it consistently provides access to a wide array of affordable goods.