"One measure of the health of the Social Security system is the difference between the market value of the trust fund and the present value of benefits accrued to date. How should present values be computed for this calculation in light of future uncertainties? We think it is important to use...

"Estimates of local land rents and firm productivity from wage and housing-cost data should incorporate parameters from the housing production function. Across cities, differences in amenity values are capitalized into the sum of local land values and federal-tax payments. Improved modeling is...