00322pab a2200121 454500008004000000100002300040245006000063260000900123300001300132362000800145650001800153773002900171180718b2000   xxu||||| |||| 00| 0 eng d  aRobertson, Raymond  aWage shocks and North American labor-market integration  c2000  ap.742-64  aSep  aLabour market  aAmerican Economic Review