CountryID               Function for creating standardised country
                        names and ID variables
DDGet                   Downloads the Democracy and Dictatorship data
                        set
DpiGet                  Downloads the Database of Political
                        Institutions (DPI)
DropNA.psData           Drop rows from a data frame with missing values
                        in the OutCountryID variable.
IMF_WBGet               Downloads Dreher's data set of IMF programs and
                        World Bank projects (1970-2011)
PolityGet               Downloads Polity IV
RRCrisisGet             Download and combine Reinhart and Rogoff's
                        (2010) crisis dummy variables into one data
                        frame
WinsetCreator           Create Winset and Selectorate variables
