“…First, a strong case can be made that the actual outcomes obtained from the 2PM provide a tighter conceptual fit to the analytical objectives pursued by a wide range of political science studies, including investigations of federal domestic outlays (Jeydel and Taylor, 2003), military conflict (Koch andGartner, 2005, Peterson andGraham, 2011), arms exports (Blanton, 2005), foreign direct investment (Jensen, 2003), and refugee flows (Moore and Shellman, 2006). Second, while it is never possible to identify the true data generation process, several methodological studies summarized in Puhani (2000) point to the superiority of the 2PM over the Heckit based on Monte Carlo evidence.…”