Smith（1979）年提出租隙（rent gap）企圖解釋仕紳化（gentrification）後，引發了租隙在理論基礎與實證方法上的討論。有關租隙成立之假設命題部份，包含資本移動、反循環投資與中心都市內鄰里所引發之不動產貶值循環等現象，不論在歐美都市或台北都會區之實證測試，均無法完全符合各項命題。 台北都會區之都市空間發展歷程與歐美都市空間發展型態並不相同，且資本並未由都會中心地區抽離，亦未有明顯的仕紳化現象，但相關實證工作已驗證出單一時點租隙的存在。不過因測試地區未普及，加上測試時間偏短，未能有效進行租隙存在意涵的討論。 故本研究以資本投入的觀點，選定台北都會區中適當地區（大安森林公園週邊、吳興街沿線與迪化街沿線各里，分別代表區域性資本投入高、中、低之區域）進行連續性租隙測試，並分析租隙的形成、變動型態及與資本投入之相互關係。此外，台北都會區與台北市內並未產生明顯仕紳化地區，以租隙論述進行都市空間發展歷程的闡述時，是否會產生解釋力不足的問題，亦為研究論述的重要內容。 / Smith proposed rent gap in 1979, which tried to explain gentrification then involved huge discussion of rent gap application in the theoretical basis and practical approach. The hypothetical premises of rent gap to be sustained include capital switching, counter cyclical investment and the depreciation cycle of inner city neighborhoods, etc. However, the practical tests whether in Western Cities or Taipei metropolitan cannot correspond completely to each premise. The urban structure of Taipei metropolitan is not exactly the same as Western Cities; besides, capital doesn’t disinvestment from the center of urban area and there is no apparent gentrification phenomenon. Nevertheless, the related pracitcal work has been examined the existence of rent gap in a single time point. The rent gap existence doesn’t have further discussion due to examination areas doesn’t broad enough plus examination period is short. Therefore, this research adopts capital investment viewpoint, selects the appropriate area in Taipei City （Ti-An Forest Park, Wu-Hsin Street and Di-Hua Street, which represents district capital investment high, medium, and low.）, does the continuous rent gap tests, and analyzes the inter- relationship of formation of rent gap, changing style and capital investment. In addition, Taipei metropolitan and Taipei City don’t have obvious gentrification, once the rent gap theory is adopted to explain urban structure, whether the explaination be powerful and proper is also an important and main content in the study.

自十九世紀末霍華德提倡「田園市」以解決倫敦市日益問題惡化的都市問題以來，新市鎮發展至今已有九十幾年的歷史。回顧各國開發新市鎮的經驗，多數新市鎮開發的結果被認為是失敗的。臺灣自中興新村開始，一連串新市鎮開發的成效都未盡理想，而日前為廣增國宅、打壓房價、並引導臺北都會區向北發展，淡海新市鎮被列為六年國建項目之一，積極開發。本論文擬以淡海新市鎮之開發目標與主要計畫內容為主，並對各國開發新市鎮的經驗加以檢討，期能找出新市鎮發展的趨勢，並對淡海新市鎮的開發目標與計畫內容有所建議。 　　本論文藉由各國開發新市鎮之經驗的文獻與臺灣地區開發新市鎮之成效的評估、次級資料的蒐集，對新市鎮的發展做一回顧，並歸納出新市鎮未來的發展趨勢，作為淡海新市鎮發展的指標；同時，藉由次級資料的蒐集與檢討，找出淡海新市鎮主要計畫的缺失與不足。 　　由本論文之研究結果顯示，新市鎮未來發展的趨勢應朝向大都會區的一環，成為都會區的一個據點，並與中心都市的機能互補，以提高新市鎮開發成功之機率。而淡海新市鎮之開發目標應朝向多機能的新市鎮發展，而非以單一的住宅機能為主；同時，淡海新市鎮在主要計畫中如土地分配不均、公共設施不足、交通設備缺乏等問題亟需改進，以提高該新市鎮開發之成效。 / Since Howard advocated the concept of "Garden City" for solving the deteriorating urban problem of Landon in the end of 19th century, it has been ninety uears in the history of new town development. The experience of new town development in most countries are, however, considered as failures. Starting from Chung Using New Village, a series of new towns have been developed in Taiwan, but wirthout many successes. In order to expand the housing construction to decrease price and guide the development of Taipei metropolitan area northbound, Dan Hai new town has recently been listed as one of the items of the Six-years National Investment Plan in Taiwan. The purposes of the research are to evaluate the experiences of new town development in various countries, to seek the trends of the devdiopment bassed on this evaluation ; and to make suggstions for the devedlopment goals and contents of the plan for Dan Hai new town. 　　In the research, we reviewed, through the literature survey of the experiences in various countries and the evaluation of effectiveness of new town development in Taiwan, the development of new towns in general. We then deduced, of the new town development in Dan Hai. In the mean time, bassed on the collection and evaluation of secondary data, we pointed out the flaws and insufficiency in the master plan of Dan Hai mew town. 　　The results indicated ehae new town development should be part of the metropolitan area, serving as a base conplementary of the function of the central city to increase the probability of success of the development. The development goals of Dan Hai new town should, on the other hand, be aimed at multifunctional new town development, not single, residential one. In the mean time, the problems in the master plan of Dan Hai new town, such as inequality in land distribution and insufficiency of public and transportation facilities, must be solved in order to increase the effectiveness of the development.