00868nam0-22002771i-450-990003234360403321000323436FED01000323436(Aleph)000323436FED0100032343620000920d--------km-y0itay50------baitaITWere Trade and Factor Mobility Substitutes in History?William J. Collins, Kevin H. O'Rourke, Jeffrey G. WilliamsonDevelopment Studies Working PapersCentro Studi Luca d'Agliano97.106Collins,William J.O'rourke,Kevin H.Williamson,Jeffrey G.ITUNINARICAUNIMARCBK990003234360403321PaperSESSESWere Trade and Factor Mobility Substitutes in History448815UNINAING01