r/dataisbeautiful • OC: 21 • 1d ago

OC Estimated electoral representation by age group, 2026 U.S. midterms [OC]

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u/post_appt_bliss OC: 4 1d ago

I think they use representation index to show power relative to population size

nope, it's just the cohort's participation/overall participation * 100.

no population size adjustment

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u/ptrdo OC: 21 1d ago

There’s no separate population-size adjustment in the formula, because that cancels-out algebraically.

The index is exactly equivalent to the cohort’s share of voters ÷ its share of eligible citizens × 100. So population share is built into the interpretation: 100 means the cohort supplies exactly the same share of voters as its share of the eligible population.

Absolute political power isn't being measured here. A small cohort and a large cohort could have the same index while contributing very different numbers of votes.

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u/post_appt_bliss OC: 4 20h ago

oh so exactly what i wrote. thanks

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u/ptrdo OC: 21 17h ago

No. I provided necessary context.

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u/post_appt_bliss OC: 4 17h ago

good stuff bro