This paper studies how subsidies for solar systems can lead to second-degree moral hazard - the impulse of installers to increase prices and/or reduce labor input when customers receive subsidies. Employing an instrumental variable strategy using plausibly exogenous variation in the size of...

The paper develops a version of Pontryagin's maximum principle for optimal control problems with monotonicity constraints on control variables. Whereas the literature handles such constraints by imposing an assumption of piecewise smoothness on the control variable and treating the slope of this...