本文研究廠商研發支出對於其生產力成長之關係，以其研究發展(R&D)上之門檻效果探究其生產績效。鑑於廠商每年對於研究發展投入大量經費支出，而欲探討廠商所投入之研究經費對於生產力之貢獻。本研究以「台灣經濟新報資料庫」，股票上市電子類股廠商1992年至2004年13年之長期追蹤資料作為實證研究之基礎，採用Hansen(1999)所提出之門檻模型檢測廠商所投入之研究發展經費之門檻效果效果與其對生產力之貢獻。 門檻效果實證結果發現，廠商研發與生產力成長間存在四個門檻值四個區間的門檻效果，門檻估計值分別為10.475324、12.434587及14.301595。研究結果顯示，隨著廠商研發資本存量之提升，對生產力成長呈顯著正向關係，此結果可提供廠商積極投入研發之誘因。 This thesis attempts to focus on the relationship between the industrial expense on R&D and the productivity, and explore s the output performance by the threshold effect of industrial R&D. In terms of huge amount expensed by firms, it is worth to do research on the contribution which is made by such expenses to productivity. This thesis will use tracing information, within the data base of Taiwan Economic Journal, about listed electronic companies from the year 1992 to 2004 as a foundation of this thesis. In addition, this thesis will adopt the threshold model which has been published by Hansen (1999) to exam the threshold effect of the expenses which have been invested by firms and the contribution of such expenses to productive. The practical result of threshold effect find four threshold values and four-areas threshold effect which are existing between the R&D and productivity of firms. The said four threshold values separately are 10.475324, 12.434587, and 14.301595. The research result of this thesis shows that the more investment put into R&D, the more productivity will increase. This result will provide firms the incentive to invest more in R&D.
