過去有關小客車需求之研究大都僅針對其持有數或使用量，事實上，小客車之持 有與使用之間密切相關，並不宜單獨予以分析。本研究企圖對小客車持有數與使用量之需求 同時進行分析，並將工作運具選擇問題亦納入分析中，嘗試由家戶同一效用函數出發，建立 小客車持有與使用、工作運具之間斷性/連續性混合需求模型。本研究以台灣地區1996年之 家戶層級個體資料從事實證分析，結果顯示小客車持有與使用、工作運具等選擇間確有相關 與聯立性存在。其次，小客車已成為一種民生必需品，其持有需求之所得彈性大於價格彈性 意謂小客車持有數量預期將持續增加，以價制量之價格手段成效有限。未來小客車政策之方 向可朝向降低小客車使用需求以間接抑制小客車持有數量之成長；小客車使用需求之控制則 可由增加小客車使用成本、降低小客車為工作運具之機率、及停車管理等三方面著手。

　　　　　Most of the previous studies on car demand focused either on car ownership or its usage. In fact, car ownership and use are different yet closely interrelated problems. In recognizing that decisions concerning the choices of car ownership, mode to work, and car use are made simultaneously, this study tries to investigate these choices using a set of discrete/continuous demand models. The mixed demand models of car ownership, mode to work, and car usr were derived from the same utility of household. Empirical analysis was done for the Taiwan Area based on a disaggregate data set at the level of individual household from a special household survey of 1996. The main findings of the empirical analysis include: (1) The decisions concerning the choices of car ownership, mode to work, and car use were made simultaneously and interrelatedly ; (2) Car has become a kind of necessity of life as rapid growth of real income. The demand for caris is more income-elastic than price-elastic indicated than car ownership is going to rise in the future, and the effect of price instruments are likely to be little; (3) To regulate the growth of car ownership, the directions of car policy should be evolved toward the reduction of car use. Furthermore, the reduction of car use should be achieved by means of increasing the cost of car use, decreasing the possibility of mode to work by car, and parking management.