De Melo, Jaime An evaluation of neutral trade policy incentives under increasing returns to scale Jaime de Melo and David Roland-Holst - Washington, D.C. IBRD 1990 - 15p. - Working Papers WPS 480 . Subjects--Topical Terms: Economies of scale --Econometric modelsExport subsidies --Econometric modelsForeign trade promotion --Econometric modelsCommercial policy --Econometric models