evaluating optimal near-term innovation investment portfolios in four key clean energy technologies (solar, biofuels … produced by climate-economy models while introducing the dimension of uncertainty in innovation ef- forts, without succumbing … innovation to improve the performance of these technologies. We employ an IAM (WITCH) which has a fairly rich description of the …

Average return differences among firms sorted on valuation ratios, past investment, prof-itability, market beta, or … growthopportunities to firm value, which affects firms' exposures to capital-embodied productivityshocks and risk premia. We thus provide …