We present an explicit framework for horizon based investing that results in superior expected risk adjusted returns and lower turnover. The framework includes a means of empirically determining an expected horizon and its confidence intervals, an alpha model structure linking horizon with the...

We show that, in a model without commitment to future policies, geoengineering breakthroughs can have adverse environmental and welfare effects because they change the (equilibrium) carbon taxes. In our model, energy producers emit carbon, which creates a negative environmental externality, and...