本研究主要目的在檢視1999年及2001年，中國電信兩次拆分對於中國電信設備製造業生產力之影響。研究方法採用Levinsohn and Petrin （2003）之兩階段模型，利用中國國家統計局調查之「製造業規模以上企業年度調查」1996至2007年資料，將生產力之變化與中國電信服務業政策變化對比。結果發現，電信設備製造業之平均生產力於2000年下降，並在2001年回升，顯示中國電信服務業與中國電信設備製造業確實有連動關係。

This work deals with the problem of indirect effects (spillovers) of foreign direct investment. The aim is to examine these spillovers in Czech, Slovak and Hungarian manufacture industry on the basis of econometric models. As the most appropriate approach of estimation of spillover effects of foreign direct investments was selected method of American economists Levinsohn and Petrin, who developed econometric approach of Olley and Pakes. Statistical data from database Amadeus are processed using this method and econometric models are created for Czech, Slovak and Hungarian republic. The results of estimation are then compared with studies of other authors.