共 8 条
[6]
Gianmarco I.P. Ottaviano,Dino Pinelli.Market potential and productivity: Evidence from Finnish regions[J].Regional Science and Urban Economics,2006(5)
[7]
Keith Head,Thierry Mayer.Non-Europe: The magnitude and causes of market fragmentation in the EU[J].Weltwirtschaftliches Archiv,2000(2)
[8]
Paul Krugman.Increasing Returns and Economic Geography[J].Journal of Political Economy,1991