本文旨在探討通勤距離與小客車持有之行為特性，此二項決策行為具聯立性與相 關性， 因此由二個單一方程式（通勤距離模型、小客車持有模型）組成一線性之聯立方程 組，據以探究二者之個別影響因素與彼此間之相互影響關係，其中，通勤距離模型採迴歸方 法建立，小客車持有模型則使用普羅比模式。構建之模型經以臺灣地區之家戶資料進行實證 分析， 獲致之主要結論包括：（ 1 ）家戶主要工作者會因持有小客車而有較長通勤距離之 趨向；相對地，家戶主要工作者之通勤距離愈長其家戶持有小客車之傾向亦較大，亦即通勤 距離與小客車持有之決策具有雙向影響關係。(2) 影響通勤距離長短之最顯著因素為工作者 之婚姻狀態、職業、年齡及家戶學齡小孩數。(3) 影響家戶持有小客車之最主要變數包括家 戶所得、學齡小孩數、小客車駕照數、小客車持有成本。

　　　　　This paper intends to study the decision-making characteristics between commuting distance and auto ownership. These two decision-making behaviors are interrelated and have the property of simultaneity. A simultaneous equation system is formulated which contains two equations one for commuting distance and one for auto ownership. The commuting distance is modeled as a regression model while auto ownership is modeled as a probit model. Empirical analysis was done for the Taiwan Area based on a disaggregate data set at the level of individual household. The main findings of the empirical analysis include (1 ) The main -worker of a household owning automobile has the tendency of commuting longer distance, and, vi 'ce ver 'sa. These indicated that the commuting distance and auto ownership have the relation of mutual influence. (2) It was found that the most effective factors influencing the commuting distance are the marital status, occupation, age and the number of schooling children of the household. ( 3 ) The major factors influencing the auto ownership for household include household income, number of schooling children, number of auto-license and the cost of owning the car.