發展經濟學理論認為，公共投資有助於整體經濟的成長，同時可以帶動產業的發展，亦是支持國家經濟的重要動力，而在面對全球產業生產模式的轉變以及產業結構變遷的階段中，臺灣地區的產業已朝向生產者服務業擴展之趨勢，為增進國家發展與提高國民生活品質之需，增加公共投資是否有助於達到上述目的值得研究。 惟近年來臺灣正面臨經濟成長萎縮與財政緊縮的窘況，公共投資的面向勢必調整於最具有影響性的產業，同時，在有限的財政資源中，應當選取可以獲得最大效益的公共投資種類作為主要投資方向，因此，本研究以臺灣地區23個縣市為實證範圍，並採自民國75-90年工商普查與都市及區域發展統計彙編之資料，以Cobb-Douglas生產函數作為實證迴歸函數，探討公共投資對製造業與生產者服務業的產出影響，並將生產函數分成未限制、規模報酬遞增固定規模報酬等三項生產模式來作為研究之實證模型。針對公共投資部分，將中央與省政府所投資的重大建設計畫再加上各縣市的決算資料予以分配計算，並依其性質分成總體公共資本、經濟性公共資本與社會性公共資本等三項存量變數作為驗證變數。 基於以上的模型設定和變數整理，本研究所得出之結果為： 1.公共投資對於產業發展是具有正向的影響性，這也驗證Rosenstein-Rodan所提出的大力推動理論，政府必須先於產業之發展而予以投資固定資本，促使產業達到提升產值的經濟效益。 2.只有產業在規模報酬遞增的生產模式中，各項公共資本的投入才會對產業產生正向關聯的影響，且其影響彈性以製造業為最。 3.經濟性公共資本與社會性公共資本的比較方面，社會性公共資本對於產業的挹注效果比較大。 4.我國製造業對於公共投資的敏感性較為顯著，當多投施一單位社會性資本的建設時，則會促使製造業的產值最大可增加0.28單位，而生產者服務業最多亦可增加0.26單位。 5.公共投資需要投注在單一產業，以引發整體經濟的成長，近期即應挹注在製造業這項產業上；在公共投資項目，則應專注於社會性的公共資本支出。

隨著知識經濟時代以及全球化的來臨，各國都市面臨全球性的競爭壓力，都市內部業種轉變為以服務業為業種主流，其中的生產者服務業更是成長快速的新興產業，更是適應全球化發展策略的重要產業。因此了解其聚集的成因將更具有時代的意義。產業聚集於都市的現象，傳統聚集經濟多以規模經濟、地方化經濟、都市化經濟為其解釋。近來，由於知識經濟的重要性，衍生出以知識的創新效果以及外溢效果來解釋產業的聚集現象。本研究利用空間距離的影響性來估計產業內知識外溢效果，並利用產業投入產出關聯係數估計產業間知識外溢效果，並採用分量迴歸來進行實證分析，以利於更詳實的解釋各知識外溢效果在於不同公司規模下的影響性。 研究結果發現，投資於R&D要素對於公司的成長並沒有顯著的影響，甚至對於中小型公司為負向影響。產業內知識外溢效果方面，對於各公司規模皆有正向的幫助。產業間知識外溢效果則呈現對大規模公司有正向幫助，對中小規模公司則為負向效果。在知識經濟時代下，兩種知識外溢效果確實有助於大規模公司的成長，為產業聚集的重要成因之ㄧ，但對於中小規模公司則有不同的效果產生。因此在促進產業發展的區位規劃設計上，需要考量不同規模公司與不同知識外溢效果的相互關係，以便有助於生產者服務業的發展，建立更具有國際競爭力的都市型態。 / Facing the developing economics of knowledge and globalization, Taipei metropolitan area has faced the issue of industrial restructuring. The strategy for globalization is to develop the producer services (PS) sector, in order to improve higher competitiveness to the city. The theory of agglomeration economics includes scale economics, localization economics and urbanization economics. Nowadays, spillover effect is considered as the most important reason that industries agglomeration develop in urban areas. This paper analyzes two categories of R&D spillover effect in the PS sector of Taipei metropolitan area by quantile regression. The spatial distance and the Input-Output table are used to calculate the intra-industrial and inter-industrial spillover effect, respectively. The result shows that investment in R&D has a negative effect to firm’s output. Firms with any scale benefit from the intra-industrial spillover effect incomplete. The inter-industrial spillover effect analysis shows that only the bigger scale firms can get the positive benefit, the smaller scale firms get the negative effect. The research analyzes different kinds of R&D spillover effect, and the result show that there are different effects among different conditions. In sum, this research suggests that the disposition of industrial location should consider both the scale of firm and the different spillover effect. As above, utilizing the R&D spillover effect is an important factor to develop the PS sector and to construct the global city.

生產者服務業其有創新與改變技術的功能，亦有調節勞力分工擴張、加強組織內部關聯的作用，由於該等功能與作用對於生產力的提昇、就業機會的創造與貿易出口量的增加均具有重要意義，因此它被視為現代生產系統中重要的部門。本研究首先以Gemmell產業成長理論探討各台北都會區產業結構的變遷，證明服務業已然成為現代生產系統中重要的部門；再以產業感應度(sensibility)、影響度(dispersion)分析生產者服務業的產業關聯，證明生產者服務業以服務生產部門為主；爾後再以組織理論(organization theory)中彈性生產(flexible production)及勞力分工(labor division)兩個向度分析生產者服務業的成長及原因，證實生產者服務業能自我創造就業及創新技術獲致成長。其後再以區位商數及成長商數交叉分析生產者服務業在台北都會區的成熟度，顯示台北縣生產者服務業呈顯著的成長然未具輸出性，成熟度較台北市弱，但因接收台北市的廠商而擴張。繼之假設生產者服務業於空間分布受到其所服務的產業影響而分布，利用兩產業間密度斜率(density gradient)的牽動關係分析生產者服務業在空間移動的現象，藉以瞭解我國在生產者服務業所應有的產業區位政策。所得的結論有二：其一，生產者服務業興製造業分布呈現互斥的情況。另外，生產者服務業與人口分布呈現移動一致的現象，亦即生產者服務業與人口的分布，呈互補性顯著的情形。最後以生產者服務業內的國際貿易業為例，分析其路網結構(network concept)後證明該業的集中與台北都會區通訊便利性及聚集經濟不可分。 / Producer Services Industres have the functions of innovation and reformation skills, and the functions to regulate the extension of division of labor and strengthen internal organizational correlation. Since these functions are important for upgrading productivity, creating job opportunities and increasing quantity of export, they are regarded as a vital sector of modern production system. 　　First, this research tries to make use of Gemmell's Theory of Industrial Development to study the changes in the structure of industries. It shows that Services Sector has become an important sector of the whole modern production system. 　　Second, this research attempts to use industrial sensbility and dispersion to analyze the correlation of Producer Services Industries. It has proved that Service Sector is a major part of Producer Services Industries. 　　Third, this research employs two kinds of vector, such as flexible production from Organization Theory, and division of labor to analyze the development and factors of emergence of Producer Services Industry. It has proved that Producer Services Inustries can bring to creation of new jobs, innovation and development of skills. 　　Fourth, this research uses Location Quotient and Growth Quotient to crossexamine the degree of maturity of Producer Services Industries in Taipei Urban District. It has shown that Producer Services Industries in Taipei Hsian bears a distinct development but not in an output manner. The degree of maturity in Taipei Hsian is lesser than that of Taipei City. And Taipei Hsian can be expanded because of absorbing or attracting the holders of factories from Taipei City. 　　Fifth, this research assumes that in terms of spatial distribution, Producer Services Industries are distributed according to the influence of Industries served by Producer Services Industries. By means of the linking and relations of density gradients among industries, the phenomenon spatial movement can be illustrated. It can be regarded as a proper industrial district policy of Producer Services Industries. 　　Two points of conclusion can be made: 1) there is a repulsion for distribution between Producer Services Industry and Manufacturing Industry; 2) there is a phenomenon of concurrent movement between Producer Services Industries and distribution of population. It means that they have a distinct condition of mutual compenstaion. 　　Sixth, this research tries to make International Trade as an example of Producer services Industries, to analyze the network concept and prove that there are no any separations among concentration of this Industry, convenience of communication in Taipei Urban District and aggregate economy.