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  • 學位論文

研發支出、信用評等與總體經濟變數對半導體公司價值的影響:差異性斜率之考量

The effect of R&D expenditure, credit rating and macroeconomic variables on the firm value of semiconductor companies: A consideration of differential slope

指導教授 : 吳博欽
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摘要


本研究利用固定效果模型及隨機效果模型估計影響股價報酬率、折現後現金流量及股價因素。研究對象為2001年以前公開上市之半導體公司,研究期間為2001第一季至2010第三季。與文獻上不同者在於本研究另考慮解釋變數對公司價值的影響是否存在差異性,亦即進行差異性斜率的估計。 實證結果發現: (1) 影響股價報酬率及股價的因素以採用固定效果模型進行估計,其效果較佳;折現後現金流量則以採隨機效果模型估計其效果較佳。 (2)在共同斜率估計模型中,研究發展費用、董監事持股比率與消費者物價指數對股價報酬率具顯著影響,且除消費者物價指數影響為負向效果外,其餘皆為正向的;股東權益報酬率、負債比率、信用評等、外資持股比率、一個月期存款利率及遠期外匯對股價具顯著的影響,且除信用評等的影響效果為負向外,其餘皆為正向的。 (3)在折現後現金流量估計結果中,僅研究發展費用具負向的影響效果。 (4)考慮差異性斜率效果後,股價報酬率模型僅董監事持股比率對各公司的股價報酬率具差異性影響;研究發展費用、股東權益報酬率、負債比率、董監事持股比率、外資持股比率、消費者物價指數、一個月期存款利率及遠期外匯對公司股價皆具有差異性影響效果。

並列摘要


This research employs the fixed effects model and random effects model to estimate the factors affecting firm value measured by stock returns, discounted cash flows and stock price, respectively. The sample objects are the semiconductor companies listed in pre-2001 period, and the sample period spans from 2001 1Q to 2010 3Q. Different from the previous studies, this paper highlights whether each explanatory variables has differential impact on firm value, i.e., the estimation of differential slope. Empirical results show that: (1) The optimal model estimating the factors influencing stock returns and stock price is the fixed effects model; however, the estimation of discounted cash flows has better goodness-of-fit applying the random effects model. (2) The estimation results of common slope models show that research and development expenses, board ownership rates and consumer price index have significant impact on stock returns, and except for the consumer price index, the remainders have positive effect. Return on equity, debt ratio, credit rating, foreign ownership ratio, one-month deposit interest rate and forward exchange have significant influence on stock prices, and except for the credit rating, the rest have positive impact. (3) The estimation result in the discounted cash flows model show that only the research and development costs generates negative effect. (4) In the differential slope estimation, each company's board ownership percentage has different effect on stock returns; research and development expenses, return on equity, debt ratio, one-month deposit interest rate, the consumer price index, board ownership ratio of foreign ownership, and forward rate yield different effect on stock prices.

參考文獻


楊幼梅 (2002),研究發展支出與未來股票報酬之關連性研究,中原大學會計研究所碩士論文。
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被引用紀錄


王虹雯(2015)。公司治理、投資人情緒與股票報酬關聯性之研究—採用Ohlson模型〔碩士論文,國立中正大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0033-2110201614014925

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