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Title: Is Global Social Welfare Incrasing? a Critical-level Enquiry
Authors: Cockburn, John
Duclos, Jean-Yves
Zabsonré, Agnès
Keywords: Global welfare
Critical-level generalized utilitarianism
Social evaluation
Welfare dominance
Critical level
Population growth
Issue Date: 2014-06
Series/Report no.: Cahiers du CIRPÉE;14-21
Abstract: 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 (CLGU). CLGU posits that social welfare increases with population size if and only if the new lives come with a level of living standards higher than that of a critical level. Despite its attractiveness, CLGU poses a number of practical difficulties that may explain why the literature has left it largely unexplored. We address these difficulties by developing new procedures for making partial CLGU orderings. The headline result is that we can robustly conclude that world welfare has increased between 1990 and 2005 if we judge that lives with per capita yearly consumption of more than $1,248 necessarily increase social welfare; the same conclusion applies to Sub-Saharan Africa if and only if we are willing to make that same judgement for lives with any level of per capita yearly consumption above $147. Otherwise, some of the admissible CLGU functions will judge the last two decades’ increase in global population size to have lowered global social welfare.
URI: https://depot.erudit.org/id/003957dd
Appears in Collections:Cahiers de recherche du CIRPÉE

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