Mandating emission control devices in new cars is only one of the most obvious steps to address the problem of vehicle emissions. Others range from taxes on gasoline and parking to incentives to scrap old cars or move businesses out of the cities. There are models to simulate the engineering...

In this report, the authors develop and estimate a model of household defensive behavior and illness. Using cross-section data from a household survey in Jakarta, they observe defensive behavior (washing hands after using the toilet) consistent with expectations: defensive effort intensifies...