We explore the role of a transmission system operator (TSO) that builds a transmission line to accommodate renewable energy while attempting to lower emissions. A TSO in a deregulated electricity industry can only indirectly influence outcomes through its choice of the transmission line...

We study a problem in which policymakers need to screen self-selected individuals by unobserved heterogeneity in social welfare gains from a policy intervention. In our framework, the marginal treatment effects and marginal treatment responses arise as key statistics to characterize social...