| Summary: | 碩士 === 國立中央大學 === 產業經濟研究所 === 94 === 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.
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