“…Other works have identified additional mechanisms by which MMC could enhance collusion, such as concavity of the profit function(Spagnolo, 1999) and imperfect monitoring(Matsushima, 2001;Kobayashi & Ohta, 2012). 2 The presence of MMC and mutual forbearance has been examined empirically across several industries, including airlines(Evans & Kessides, 1994;Prince & Simon, 2009;Ciliberto & Williams, 2014), cement(Jans & Rosenbaum, 1997), banking(Molnar et al, 2013), movies(Feinberg, 2015), and radio(Waldfogel & Wulf, 2006), among others. More recently, Schmitt (2018) examines the role of MMC in hospital markets, andWilson (2019) examines MMC in the internet service provider market.3 This reflects nearly a four-fold increase since the Medicare Modernization Act of 2003.…”