00366pab a2200121 454500008004000000100001700040245009600057260000900153300001400162362000800176650001200184773004800196180718b2002   xxu||||| |||| 00| 0 eng d  aGibson, John  aWhy does the Engel method work? Food demand, economies of size and household survey methods  c2002  ap.341-59.  aSep  aPoverty  aOxford Bulletin of Economics and Statistics