00793naa a2200229 a 450000100080000000500110000800800410001910000170006024501180007726000090019552001140020465000260031865000160034465000120036065000130037265300250038565300160041065300200042665300210044665300220046777300740048917880581996-03-29       1980    bl ---       0--  u    #d1 aDAVIS, J. S.  aA note on the use of alternative lag structures for research expenditure in aggregate production function models.  c1980  aIn the literature has been found that a wide range of alternative research lag specifications have been used.  aagricultural research  aAgricultura  aDespesa  aPesquisa  aAggregate production  aExpenditure  aFunction models  aModelo de funcao  aProducao agregada  tCanadian Journal of Agricultural Economicsgv.28, n.2, p.72-76, 1980.