Wolfgang Lutz|Samir Kc
Dimensions of global population projections: what do we know about future population trends and structures?
International Institute for Applied Systems Analysis|Austrian Academy of Sciences|Vienna University of Economics and Business|International Institute for Applied Systems Analysis
total size world population likely increase current 7 billion 810 billion 2050 uncertainty unknown future fertility mortality trends different parts world young age structure population fact much africa western asia fertility still high makes increase least one billion almost certain virtually increase happen developing world second half century population stabilization onset decline likely addition future size population distribution age sex level educational attainment place residence specific importance studying future food security paper provides detailed discussion different relevant dimensions population projections evaluation methods assumptions used current global population projections particular produced united nations iiasa