共 2 条
[1]
Infrastructure and productivity: a nonlinear approach[J] . Vijaya G. Duggal,Cynthia Saltzman,Lawrence R. Klein.Journal of Econometrics . 1999 (1)
[2]
Risk, direct investment and International diversification[J] . Alan M. Rugman.Weltwirtschaftliches Archiv . 1977 (3)