The ratio of expansion to compression: A new measure of lifespan disparity

• Zhen Zhang,

  Roles Conceptualization, Formal analysis, Software, Writing – original draft, Writing – review & editing

  Affiliation Institute of Population Research, School of Social Development and Public Policy, Fudan University, Shanghai, P. R. China

  https://orcid.org/0000-0002-7603-3824

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• Qiang Li

  Roles Conceptualization, Formal analysis, Writing – original draft, Writing – review & editing

  * E-mail: qli@soci.ecnu.edu.cn

  Affiliation Population Research Institute, School of Social Development, East China Normal University, Shanghai, P. R. China

  https://orcid.org/0000-0002-2477-4962

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