Pesticides, a short-term aid for farmers, can often be harmful, undermining the long-term health of agriculture, ecosystems, and people. The United States and other industrialized countries import food from Costa Rica and other regions. To safeguard the public health, importers now regulate the level and types of pesticides used in the exporters' food production, which creates "regulatory risk" for the export farmers. Although farmers respond to export regulations by trying to avoid illegal pesticide residues, the food produced for their domestic market lacks similar regulation, creating a...