title: Better way to measure ageing in East Asia that takes life expectancy into account.
abstract: OBJECTIVE
  The aim of the study was to improve the measurement of ageing taking into account characteristics of populations and in particular changes in life expectancy.
  
  
  METHODS
  Using projected life tables, we calculated prospective old age dependency ratios (POADRs) to 2060, placing the boundary to old age at a moving point with a fixed remaining life expectancy (RLE) for all countries of East Asia.
  
  
  RESULTS
  POADRs grow less rapidly than old age dependency ratios (OADRs). For example, in the Republic of Korea, the OADR is forecast to increase from around 0.1 in 1980 to around 0.8 in 2060, while the POADR is forecast to increase from around 0.1 to 0.4 over the same period.
  
  
  CONCLUSIONS
  Policy makers may wish to take into account the fact that the increases in measures of ageing will be slower when those measures are adjusted for changes in life expectancy.
authors.affiliation: World Population Program, International Institute for Applied Systems Analysis, Laxenburg, Austria.
authors.forename: Sergei
authors.initials: S
authors.lastname: Scherbov
authors.affiliation: World Population Program, International Institute for Applied Systems Analysis, Laxenburg, Austria.|Department of Economics, Stony Brook University, Stony Brook, New York, USA.
authors.forename: Warren C
authors.initials: WC
authors.lastname: Sanderson
authors.affiliation: Department of Social Policy and Intervention, University of Oxford, Oxford, UK.
authors.forename: Stuart
authors.initials: S
authors.lastname: Gietel-Basten
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D005202:Asia, Eastern; D005260:Female; D005544:Forecasting; D006801:Humans; D008017:Life Expectancy / Q000639:trends*; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D011157:Population Dynamics / Q000639:trends; D013997:Time Factors; D055815:Young Adult
keywords: East Asia; ageing; demography; old age dependency ratio; pension