Adjustment of small, medium, and large Vermont dairy farms to successively tighter constraints on phosphorus loss was modeled using linear programming. Aggregate response to phosphorus control was estimated for an area from farm marginal costs. Medium and large farms have lower costs than small...

This paper addresses the possibility of biased estimates of the determinants of food expenditures of households eligible for the food stamp program. The source of such bias, sample partitioning, is describes and a correction procedure is utilized. For eligible nonparticipants' food expenditure...