We study the heterogeneity of preferences regarding the limited substitutability of environmental public goods vis-a-vis private consumption goods and how it affects the economic valuation of environmental public goods. We show theoretically that mean marginal willingness to pay for an...

Data from a farm survey and choice experiment are used to value the benefits of Bt cotton in Pakistan. Unlike previous research on the economic impacts of Bt, which mostly concentrated on financial benefits in terms of gross margins, we also quantify and monetize positive externalities...