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Working Paper - Urban Institute

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calculated, MINT calculates SSI eligibility and projects participation and benefits for eligible<br />

participants.<br />

Finally, MINT calculates annual state and federal income taxes from federal and state tax<br />

calculators and additional data from a statistical match with an enhanced Statistics of Income<br />

(SOI) file. The statistical match uses a minimum distance function. The key match variables are<br />

filing status, age of family head, wage and salary earnings, self-employment earnings, pension<br />

income, Social Security benefits, home equity, and financial assets. The enhanced SOI is used as<br />

the data source for interest, dividends, rental income, and itemized deductions; these variables<br />

are needed for calculation of income tax liabilities.<br />

The enhanced SOI file used with MINT is based on the 2001 SOI statistically matched to<br />

the 1996 SIPP to add home equity, financial assets, and age. This match uses a minimum<br />

distance function that includes filing status, state, number of exemptions, wage and salary<br />

income, self-employment income, Social Security income, pension income, IRA distributions,<br />

interest, dividends, rental income, alimony, and unemployment compensation.<br />

This report calculates asset income based on the annuity that families could purchase<br />

from 80 percent of financial assets. MINT uses this annuity income to calculate retirement<br />

income; not the SOI imputed interest, dividends, and rental income. MINT uses the potential<br />

annuity instead of capital income from assets as an income measure to treat families with DC<br />

pensions in a comparable fashion as families with DB pensions. The potential annuity amount<br />

will exceed the return on capital—interest, dividends, and rental income—because the annuity<br />

includes repayment of principal in addition to capital income. This places the measured income<br />

The Disappearing Defined Benefit Pension 46

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