We focus on regulations controlling the spread of noxious weeds, especially the trade effects of regulatory differences across U.S. states. We specify a gravity model for each state’s seed, nursery product, and commodity trade with each other state. Within the gravity model, we examine...

Many non-native weed pests of food, fiber, and nursery crops pose threats to the U.S. environment and agriculture. We focus on regulations controlling the spread of noxious weeds, and especially the determinants of regulatory differences across U.S. states. With a simple game-theoretic...

Many non-native insect, disease, and weed pests of food, fiber, and nursery crops pose threats to the U.S. environment, agricultural production, and exports. In this study we focus on regulations controlling the spread of noxious weeds, especially the regulatory differences among US states and...