PGDP                    Price Index for Gross National Product/Gross
                        Domestic Product (PGDP)
Plot_Tradeoff           Visualizes the size distortion maximum power
                        loss tradeoff from the Diebold-Mariano test for
                        equal predictive accuracy
RGDP                    Real Gross National Product/Gross Domestic
                        Product (RGDP)
TBILL                   3-Month Treasury Bill Rate (TBILL)
UNEMP                   Civilian Unemployment Rate (UNEMP)
