Go to the Website of the Federal Reserve Bank of St. Louis (FRED)(reserch.stlouisfed.org/fred2/) and for the period from January 1957 to the present download to the same graph the data series for the 3-month Treasury bill (TB3MS) and the 10-year Treasury note (GS10). Go to the web site of the National Bureau of Economic Research (nber.org) and find the datas for business cycle peaks and troughs (the period between a business cycle peak and trough is a recession). During which months was the yield curve inverted? How many of these periods were followed within a year by a recession?