Do Retail Mergers Affect Competition? Evidence from Grocery Store Retailing, Daniel Hosken, Luke Olson, and Loren Smith, in the Journal of Economics and Management Strategy, 2018, right here: .
This article addresses a fundamental question--the effects of horizontal mergers on price--and obtains uncontroversial conclusions. However, its results are implausible, with this implausibility obscured by the presentation. It wonderfully illustrates the problems you can get into by organizing your study around the estimation of a coefficient rather than the explanation of the dependent variable. Place your thoughts in comments.