海量图书期刊资源,随时随地畅享阅读乐趣
The international telecommunications imbalances: an empirical analysisGastaldi, Massimo; Levialdi, Nathan Ghiron; Nucciarelli, Alberto · International Journal of Logistics Economics and Globalisation · 2008
Asymmetric competition and collection rates differentials: determinants of prices in international telephone service marketsAlberto Nucciarelli; Massimo Gastaldi; Nathan Ghiron Levialdi · 2010