Car-sharing has experienced a significant boom in recent years, with estimates suggesting that car-sharing programs are now operating in over 30 countries worldwide, serving around five million users. The potential to reduce individual vehicle ownership rates is frequently cited as a motive for promoting car-sharing. While some previous studies have argued that customers are indeed willing to reduce the total number of vehicles owned after becoming car-sharing members, the reliability of these findings is tenuous given that many are based on self-selected samples of car-sharing users, resulting in biased estimates. In theory, the availability of car-sharing programs could have limited effect on the general public’s car ownership decisions–or at least have no effect on a large portion of travelers. Whether or not traveler decision processes are significantly influenced by specific attributes of different car-sharing options (e.g., access time, vehicle size, fuel type, etc.) remains an unanswered question, as there are limited quantitative studies on this issue. To contribute to filling this research gap, this paper discusses the findings of a study of 1,500 private households across major Australian cities. A nested logit model is used to investigate the impacts of car-sharing on respondents’ household vehicle ownership decisions. In contrast to the results of some previous studies, we find that the stated availability of car-sharing appears to have minimal impact on respondents’ decision to own a vehicle or not, leading to important policy implications. We agree with prior investigations that car-sharing could potentially reduce private car ownership. However, because this study finds limited impact of the availability of car-sharing on vehicle ownership, and because the majority of respondents did not self-identify as car-sharing users, education and awareness campaigns could be important factors in improving the general public’s preferences towards car-sharing and fully realizing car-sharing’s benefits to society.

近年来，汽车共享经历了巨大的发展，据估计，汽车共享计划现已在全球30多个国家/地区开展，为大约500万用户提供服务。降低个人汽车拥有率的潜力经常被认为是促进汽车共享的动机。尽管先前的一些研究认为，在加入汽车共享会员之后，客户确实愿意减少拥有的车辆总数，但是鉴于许多结果都是基于自选的汽车共享用户样本，因此这些发现的可靠性是微不足道的。有偏见的估计。从理论上讲，提供汽车共享计划可能对公众的汽车拥有权决策影响有限，或者至少对大部分旅行者没有影响。旅行者决策过程是否受到不同汽车共享选择的特定属性（例如，出行时间，车辆大小，燃料类型等）的显着影响，仍然是一个悬而未决的问题，因为对此问题的定量研究十分有限。为了填补这一研究空白，本文讨论了对澳大利亚主要城市的1,500个私人家庭进行的一项研究的结果。嵌套的logit模型用于调查汽车共享对受访者的家用车拥有权决定的影响。与之前的一些研究结果相反，我们发现，规定的共享汽车似乎对受访者是否拥有汽车的决定影响最小，从而导致重要的政策含义。我们同意之前的调查，即共享汽车可能会减少私家车的拥有量。但是，由于这项研究发现共享汽车对汽车拥有者的影响有限，并且由于大多数受访者没有自我认同为共享汽车的用户，因此开展教育和提高认识运动可能是改善公众偏好的重要因素共享汽车，并充分实现共享汽车对社会的好处。