Asthma patients' health status may be especially sensitive to some types of air pollution, but the evidence on this is mixed. We explore the effects of ground-level ozone on asthma patient's activities, breaking apart the usual aggregated category of leisure into indoor and outdoor activities,...

The cost of travel time has commonly been incorporated in recreation demand models as some fucntion of the wage rate. This paper proposes a new methodology of determining the value of leisure time. The proposed method is compared to other alternatives and shown to yield more appropriate welfare...