The authors thank Felipe Cabezón, Murillo Campello, Mike Cooper, Igor Cuhna, Harry DeAngelo, Brandon Julio, Michael Kisser, Borja Larrain, Danmo Lin, Steve McKeon, Ana Elisa Pereira, Jim Schallheim, Al Sheen, Juan Sotes-Paladino, Shawn Thomas, Sheridan Titman, Steven Xiao, Alminas Zaldokas, and Feng Zhang for valuable comments. The authors are also indebted to participants at the 2018 FMA meeting, the 2018 MFA conference, the 2018 Lubrafin conference, and the 2018 European FMA conference as well as seminar participants at the University of Oregon, University of Nebraska, Warwick University, Universidad de Chile, Universidad Católica (PUC- Chile), and the University of Utah.