00435pab a2200145 454500008004000000100002300040245007400063260000900137300001400146362000800160650003300168650001700201700002300218773004800241180718b2007   xxu||||| |||| 00| 0 eng d  aCaporale, Gulielmo  aNonlinearities and fractional integration in the US unemployment rate  c2007  ap.521-44.  aAug  aUnemployment - United States  aUnemployment  aGil-Alana, Luis A.  aOxford Bulletin of Economics and Statistics