Share of the elderly age 70 to 75 at various income-to-supplemental-poverty-threshold ratios under the current Social Security COLA index and an estimated chained-CPI index, 2009–2011 average

Note: SPM refers to the Supplemental Poverty Measure.  The current cost-of-living adjustment (COLA) to Social Security benefits uses the consumer price index (CPI) for wage earners. Tying the COLA to a "chained" CPI would lead to smaller COLAs.

Source: Authors' analysis of pooled 2009–2011 Current Population Survey Annual Social and Economic Supplement microdata

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