Competition is (still) a tough weed: A review essay of Thomas Philippon's The great reversal: How America gave up on free markets.

In The Great Reversal, Philippon makes the case that competition in America has weakened during the past two decades. His book contributes to the rapidly developing literature on the macroeconomic consequences of market power. I argue that Philippon fails to convincingly support his hypothesis because (1) he does not consider competition as a process operating on several margins, with the price being only of them, and (2) the available empirical data does not unambiguously show a rise in market power. Philippon's work suffers from similar flaws as the "structure-conduct-performance" paradigm. I also incorporate recent attempts to estimate aggregate market power and explain why the methods used for such estimations are calculated by making assumptions over which margins entrepreneurs compete and suffers from serious knowledge problems. Finally, I offer an alternative view of competition, which focuses on how and at what speed rents are being dissipated instead of the markup of price over marginal cost. [ABSTRACT FROM AUTHOR]