Policy discussions and a U.S. Supreme Court decision interpret retailer services induced by retail price maintenance (RPM) as enhancing consumer surplus (CS) and welfare enhancing, marginalizing dissenting opinions that use similar models but with different parameters. However, if presales...

The influential Scherer and Ross text (1990, p. 411) states that the ?main question? in empirical industrial organization in the latter part of the twentieth century is Bain?s (1951) ?collusion? or ?agreement? hypothesis versus Demsetz?s (1973) ?superior firm? hypothesis. Prior to the Federal...