-efficiency across generations and sustainability, i.e. non-decreasing utility over time. Our model includes two salient characteristics … of sustainability problems and policy: (i) temporal irreversibility, i.e. the inability to revise one's past actions; (ii … initially unforeseen sustainability problems become apparent and policy is enacted after irreversible actions were taken, policy …

-efficiency across generations and sustainability, i.e. non-decreasing utility over time. Our model includes two salient characteristics … of sustainability problems and policy: (i) temporal irreversibility, i.e. the inability to re- vise one’s past actions …”. If initially unforeseen sustainability problems become apparent and policy is enacted after irreversible ac- tions were …