00349pab a2200133 454500008004000000100002200040245004600062260000900108300001500117362001100132650001300143650002200156773003700178180718b2012   xxu||||| |||| 00| 0 eng d  aEdelman, Benjamin  aUsing internet data for economic research  c2012  ap.189-206.  aSpring  aInternet  aEconomic research  aJournal of Economic Perspectives