We assess whether global social welfare has improved in the last decades despite (or because of) the substantial increase in global population. We use for this purpose a relatively unknown but simple and attractive social evaluation approach called critical-level generalized utilitarianism...

This report takes stock of scientific findings to date regarding the distributional effects of policies discouraging car use in urban areas. These policies include cordon tolls, distance-based charges, fuel taxes, parking measures and public transport subsidies. The report describes the...

The Mitigation Work Programme (MWP) was established at COP26 to urgently enhance mitigation ambition and implementation in this critical decade. This paper explores how the MWP could build on and amplify relevant existing efforts, within and outside the UNFCCC, to trigger the rapid scale up of...

The discounted utilitarian criterion for infinite horizon social choice has been criticized for treating generations unequally. We propose an extended rank-discounted utilitarian (ERDU) criterion instead. The criterion amounts to discounted utilitarianism on non-decreasing streams, but it treats...

I study the egalitarian way of distributing resources across generations. Distributional equity deeply conflicts with the Pareto principle: efficient allocations cannot guarantee that i) each generation be assigned a consumption bundle that is at least as large as an arbitrarily small fraction...

Climate science indicates that climate stabilization requires low GHG emissions. Is this consistent with nondecreasing human welfare?

Assessments of social welfare do not usually take into account population sizes. This can lead to serious social evaluation flaws, particularly in contexts in which policies can affect demographic growth. We develop in this paper a littleknown though ethically attractive approach to correcting...

Climate change is now affecting agriculture and food production in every country of the world. Here the authors present the IMPACT model results on yield, production, and net trade of major crops in China, and on daily calorie availability as an overall indicator of food security under climate...

Climate change is now affecting agriculture and food production in every country of the world. Here the authors present the IMPACT model results on yield, production, and net trade of major crops in China, and on daily calorie availability as an overall indicator of food security under climate...

The term low-emission development strategies (LEDS) first emerged under the United Nations Framework Convention on Climate Change (UNFCCC) in 2008 and its possible role in a future climate framework continues to be debated. Though no formally agreed definition exists, LEDS are generally used to...