中國經濟發展快速的情況下，人民對於汽車的需求也一直再提高，在基礎建設尚未追上汽車數量增加之下，道路擁擠與環境汙染成為了許多城市必須面對的問題。北京市政府於2010年12月23日實施汽車限購政策，希望透過此政策降低汽車增加的速度。另一方面，中國將發展汽車自主品牌作為重要政策之一，希望藉由外資的技術讓自主品牌的汽車打入國際。因此本文將使用差中差法進行估計，研究北京市在汽車限購政策之後，政策對於自主品牌銷售的影響。 研究中所使用的資料為中國「中國車輛登記管理所」之中的「全中國登錄各月新增車輛」，加上「易車網」的汽車特性資料整理而成。以北京市的自主品牌車系作為實驗組，非自主品牌車系作為對照組進行多次估計，其中包括加入時間趨勢及將極端樣本去除等。研究結果皆顯示，在汽車限購政策後，確實對於自主品牌汽車銷售有下降的影響，最後也加入了穩定性檢驗，證明自主品牌的銷售下降是否與政策有關。最後結果亦與預期相同，證實北京市的汽車限購政策對於自主品牌的銷售有負向的效果。 / With the rapid economic growth in China, people’s demand for automobiles has risen continuously during the past decades. Furthermore, because the infrastructure in China failed to sustain the increase in the quantity of automobiles, traffic congestion and environmental pollution are the problems many cities have to be confronted with. Therefore, Beijing government adopted Automobile Purchase Limit Policy in Dec. 23, 2010, hoping that through the policy it can decrease the growth rate of automobiles. On top of that, developing self-owned Brand for automobiles in China is its primary policy, China government hoped to take advantage of foreign technology to make its self-owned Brand step into the international market. Consequently, this article uses Difference-in-Difference method to analyze how the sales of self-owned brand automobiles would be affected after the Automobile Purchase Limit Policy was enacted. Data used in this article is from Monthly Increase in Registered Vehicles Across China, which is from Vehicle Registration and Managemet Bureau of Chian, and from Yiche Network. Setting the self-owned brand mobiles in Beijing city as an experimental group and non-self-owned brand mobiles as a control group, we are to estimate many times. We try to take time series effect into account and eliminate outlier samples. The result shows that after the Automobile Purchase Limit Policy, the sales of self-owned brand automobiles significantly decrease. Finally, we add stability test to observe whether the decrease in the sales of self-owned brand automobiles is related to the policy or not. The result reveals that the Automobile Purchase Limit Policy in Beijing has a negative impact on the sales of self-owned brand automobiles.

本研究是以個案公司為例，藉以了解企業公司盛衰起伏的背後原由。對於這些果與因，雖然不能直接以簡單的原由來歸納與說明，但其發展過程中勢必有其脈絡，可以幫助了解公司發展與適應的做法。因此本研究透過描述個案公司各項策略作為，來了解企業經營的歷程。 　　本文第貳章說明研究動機與問題，並對本研究的各項變數做必要的定義。第參章對個案公司的基本資料與背景有較多的說明。本研究主體係個案公司責任中心二(Strategic Business Unit II)，該事業單位為自動資料蒐集產業(Automatic Data Collection)的本土製造商，自1985年第一台條碼閱讀機問世至今，在產業中已將近十六年的時光。 　　十六年以來，由人機介面(Input Device)的定位，以開發個人電腦鍵盤與自動資料辨識產品(Automatic Identification & Data Capture，AID)的條碼閱讀機(Bar Code Reader)，到目前以自動資料蒐集(Automatic Data Collection)產業的主流產品攜帶式自動資料蒐集終端機(Portable Data Collection Terminal)為主的經營範疇；經銷通路從貿易商為主的型態，轉而進入經銷商與系統整合商的通路；由完全沒有產業知名度，到進入美國前十名的自動資料蒐集產業供應商。地理構形也從本土企業出發，成為跨美、歐、日與大陸都有分支機構的跨國經營。 　　從以上的說明可以了解個案公司的發展歷程，詳細的內容可以參考第參章與第肆章的兩個策略轉折點前後的各個構面分析；本文中另以競技場分析，比較個案公司歷經策略轉折點之後在體系、產業結構、產品/市場的相關位置，透過競技場分析可以讓經營者更清楚未來的策略走向。 　　本文第伍章則提出研究發現與後續研究建議，其中的研究建議較值得注意的是個案公司最新的主流產品WinCE攜帶式終端機即將進入開放式的主流環境，在開放式的主流環境對未來成長有絕對的幫助，但風險當然也就大很多。而這項經驗在個案公司早期投入個人電腦鍵盤產品時期非常類似，若能透過對個人電腦產業的反思，相信面對未來的競爭思考能有方向的指引作用。 / “The Company” has been used as an example for my thesis, that helps to understand how an enterprise been successful and going dead. Those reasons and results to be successful and dead, which maybe not easy to get conclusion from simple examples, but we did understand all possible development from those tracks. We are also possible to find the way to adapt all those changes from all tracks’ studies. 　　In this case, the chapter 2 gives the motivation and answers about the reasons to have this thesis. It also defines all variables. In Chapter 3, I give more information and back ground about “The Company.” The major studied body is the SBU II (Strategic Business Unit II) of “ The Company”. That SBU II is the Taiwanese local maker for ADC (Automatic Data Capture) industry. The SBU II produced first Bar Code Reader since 1985 and is existed in the ADC industry more than 16 years. 　　Since last 16 years, “The Company” was positioned as “Input Device Provider,” that developed the keyboard for IBM Personal Computer and Bar Code Reader for AIDC (Automatic Identification and data collection) Industry. Up to now, the business scopes of “The Company” is producing the main trend products for ADC industry, which is Portable Data Collecting Terminal. During last 16 years, the distribution channels of “The Company” are changed from “Trading Company” to “VAR (Value Added Retails) and SI (System integrators). It is also changed from “ No Named Company” becomes one of ten major players of ADC industry in USA market. The geographical point of view is also changed from Taiwanese company to become multiple locations in Europe, USA, The Mainland China and Japan. 　　The description above helps to understand the development of “ The Company”. The detailed information will refer all details in “Three Dimensional Analysis” of those two strategic turning points in the Chapter 3 and Chapter 4. In these chapters, “The Competitive Field Model” is used to compare the different related positioning between two industrial structures, Products and Markets. After that study, I hope that can guide “The Company” to be much clear the way to the future. 　　In Chapter 5, I give some comments about my own development and also give some hints for future studies. There are some key comments about “The WinCE Portable Terminals”, which are going to be the main trend products and opened architecture environment. In the opened architecture environment that is very high growth in market size and industrial business. That is of course coming with very high risky in the future. This experience is very similar with the age of IBM PC Keyboard. If we can rethink the related experience from IBM PC age that may help a lot to face all future market competition. That is one of the key reasons to have this case study.