共 73 条
[4]
[Anonymous], 1976, Res. Pol., DOI [10.1016/0048-7333(76)90028-7., DOI 10.1016/0048-7333(76)90028-7, 10.1016/0048-7333(76)90028-7]
[5]
[Anonymous], 2001, NBER PATENT CITATION
[6]
[Anonymous], 1996, MASTERING DYNAMICS I
[7]
[Anonymous], 1997, The American Economic Review
[8]
[Anonymous], 2000, PROTECTING THEIR INT