00350pab a2200133 454500008004000000100002300040245004700063260000900110300001100119362000800130650002700138700002000165773003100185180718b1987   xxu||||| |||| 00| 0 eng d  aCoulson, N. Edward  aTransportation costs and the rent gradient  c1987  a287-97  aMay  aTransportation - Costs  aRobert F. Engle  aJournal of Urban Economics