英文文献：Defensive purchasing and motor-vehicle policy effectiveness
英文文献作者：Ando, Amy Whritenour,Brozovic, Nicholas
英文文献摘要：
We present a theory of vehicle choice where utility depends on the vehicle choices made by other consumers. We use parameters from current transportation and public safety data to show that changes in motor vehicle policy may have unexpectedly large or non-existent effects on safety, fleet mix, and the environment.