The analysis detailed in Equations 2.3 and 2.4 is reestimated using the sample obtained from the SIPP for the years 1986 through 1997. Table 2.3 reports the coefficients of interest from estimating the bivari-ate probit model with selection using the SIPP data. The results reported in Table 2.3 mirror those in Table 2.1, with one difference: employment among the disabled increased more post- versus pre-ADA than did the employment of the nondisabled. This positive 0.0768 coefficient on disable x post translates into a 0.8 of a percentage point higher employment probability for the disabled relative to the
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