突然有个有趣的现象浮现出来，就是从1980年开始，为什么经济衰退大多发生在共和党的任期内。这个问题很有意思。
1980 recession
Jan–July 1980
Early 1980s recession
July 1981 – Nov 1982
Early 1990s recession
July 1990 – Mar 1991
Early 2000s recession
March 2001–Nov 2001
Great Recession
Dec 2007 – June 2009[49][50]
