本研究主要目的為探討產業過去之購併活動，對公司的研發投入的影響。產業的購併活動活躍與否，可視為此產業中資產的流動性衡量，根據Phillips and Zhdanov （2012）所使用之方式，利用產業過去的購併交易所計算出變數，可用以解釋公司的研發投入。本文有別於傳統之樣本分類法，而是採用不同的變數來衡量產業分類，藉以分析同業購併、異業購併以及產業整體購併對公司研發投入的影響。從實證結果發現，當過去的同業內購併活動越盛行時，公司的研發投入越高。而公司的研發投入，又與公司之規模大小有關，隨著公司規模大小不同，購併活動對研發投入的影響程度也隨之改變，隨著公司規模越大，受到的影響則越小，具有規模效應。本研究同時考量產業需求變動以及競爭程度對公司研發投入的影響，實證發現公司研發投入與產業需求及競爭程度為正向關係，且同樣具有規模效應。

The objective of this study is to analyze how an active acquisition market affects Taiwan firms’ incentives to conduct R&D. It follows Phillips and Zhdanov（2012）that using the value of past M&A activity in the firm’s industry to captures the historical liquidity of an industry’s assets. Different from other studies which usually split sample into different groups to examine inside- and outside-industry, this study use three variables to measure how M&A activity in inside-, outside- and whole-industry affect firms on conducting R&D in different ways. According to the empirical results of the regression analyses, we find that firms’ incentives to conduct R&D increase with inside industry M&A activity and the effect is stronger for small firms than large firms. We also find that firms’ R&D are positively correlated with industry demand and competition, and both of these effects are also stronger for small firms than for large firms.

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