The Growing Gap in Life Expectancy by Income

This is a National Academies report, so the methodological rigor and authoritative provenance are genuine — cohort-level data, Congressional citation, free public access. For readers who care about health equity and entitlement policy, it is exactly the kind of foundational document that shapes serious debate. It is not casual reading, and the academic language will lose general audiences, but for its intended purpose it is highly credible and important.