Go to the web site of the Federal Reserve Bank of St. Louis (FRED) (fred.stlouisfed.org) 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 dates 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?