Ryazantsev S. V., RakhmonovA. Kh. and Ryazantsev N. S. Decomposition of life expectancy gaps by age between the Republic of Tuva and Moscow using the Arriaga method. New Research of Tuva, 2026, no. 2, pp. 95-107. DOI: https: ...

Текст статьи на сайте журнала URL: https://nit.tuva.asia/nit/ru/article/view/1678 (дата обращения 05.06.2026)

Abstract

This study investigates the differences in life expectancy between Moscow and the Republic of Tuva in Russia by applying the Arriaga decomposition method. Using official mortality data from 2023, we have constructed life tables for both regions, revealing a life expectancy at birth of 76.9 years in Moscow and 66.7 years in Tuva, resulting in a gap of approximately 10.3 years. The decomposition analysis has shown that the majority of the life expectancy difference is attributed to higher mortality rates in young and middle adulthood (20–49 years) in Tuva. Mortality differences in infancy and old age also contribute to the gap, but to a lesser extent. The findings reveal that age groups corresponding to young and middle adulthood make the largest contributions to the overall life expectancy disparity between the two regions. The study highlights that while differences exist at all stages of life, addressing mortality among working-age adults would have the greatest impact on narrowing the gap. The aim of the study is to quantify the age-specific contributions to the life expectancy gap between Moscow and Tuva and to identify the critical age groups most responsible for the observed differences. By analyzing the decomposition of mortality differences across age groups, the study provides a detailed understanding of the demographic mechanisms driving regional disparities in life expectancy within Russia.