00495nam a2200133Ia 4500082002000000100009100020245008600111260004400197300002100241500006300262500000500325653000600330700002500336  a338.06bC748.RD  aConference of "National Bureau of Economic Research", Lanox, Massachusetts, Fall, 1981  aResearch and development patents and productivity; papersbcEd. by Zvi Griliches  aChicagobChicago University Pressc1984  aix, 512p. Index.  a(National Bureau of Economic Research Conference, report).  a  a   aGriliches, Zvi ; ed.