参考文献:
[1]Barro, Robert J., 1991, Economic growth in a cross section of countries, Quarterly Journal of Economics 106, 407~443
[2]Bhagwati, Jagdish, 1978, Anatomy and consequences of exchange control regimes (Ballinger, Cambridge, MA)
[3]Helpman, Elhanan, 1993, Innovation, imitation, and intellectual property rights, Econometrica 61, 1247~1280