Table 6.

Regression results and descriptive statistics for SIPP data in Table 1

	Linear probability predicting employment		Heckman model predicting ln(hourly pay)
			Pay coefficients		Selection model		Mean	(s.d.)
	(1)		(2)		(3)		(4)
Disability type
Vision impairment	−0.048	(0.018)	−0.124	(0.057)	−0.230	(0.064)	0.041	(0.197)
Hearing impairment	−0.013	(0.017)	−0.005	(0.042)	0.002	(0.060)	0.038	(0.191)
Speech impairment	−0.105	(0.026)	−0.133	(0.085)	−0.563	(0.108)	0.017	(0.131)
Difficulty with physical activities:
Climbing 10 stairs	−0.043	(0.020)	−0.055	(0.045)	−0.130	(0.063)	0.087	(0.281)
Walking 3 blocks	−0.129	(0.020)	−0.115	(0.050)	−0.316	(0.061)	0.092	(0.289)
Standing for one hour	−0.134	(0.019)	0.024	(0.039)	−0.334	(0.057)	0.115	(0.320)
Sitting for one hour	0.005	(0.018)	0.015	(0.046)	−0.004	(0.064)	0.072	(0.259)
Stooping, crouching, or kneeling	−0.033	(0.015)	−0.059	(0.029)	−0.047	(0.047)	0.143	(0.350)
Reaching over head	−0.033	(0.018)	−0.011	(0.046)	−0.095	(0.064)	0.064	(0.245)
Lifting and carrying 10 lbs	−0.103	(0.021)	0.037	(0.051)	−0.330	(0.066)	0.077	(0.267)
Pick up glass or grasp pencil	−0.010	(0.019)	−0.117	(0.050)	−0.065	(0.069)	0.046	(0.210)
Pushing or pulling large objects	−0.093	(0.018)	−0.007	(0.039)	−0.288	(0.055)	0.108	(0.310)
Mental or cognitive impairment:
Learning disability	−0.023	(0.019)	0.015	(0.049)	−0.171	(0.070)	0.037	(0.188)
Alzheimer’s, senility, or dementia	−0.104	(0.023)	−0.059	(0.085)	−0.287	(0.101)	0.026	(0.158)
Intellectual disability	−0.097	(0.037)	−0.536	(0.149)	−0.185	(0.139)	0.013	(0.115)
Developmental disability	−0.104	(0.048)	−0.094	(0.147)	−0.268	(0.168)	0.007	(0.085)
Other mental/emotional condition	−0.068	(0.018)	−0.120	(0.046)	−0.236	(0.065)	0.045	(0.207)
Female	−0.099	(0.007)	−0.250	(0.013)	−0.198	(0.024)	0.518	(0.500)
Education
Some HS	−0.069	(0.023)	0.144	(0.050)	−0.255	(0.071)	0.086	(0.280)
HS or GED degree	0.064	(0.020)	0.367	(0.045)	0.169	(0.064)	0.261	(0.439)
Some college, no degree	0.095	(0.021)	0.436	(0.046)	0.172	(0.066)	0.204	(0.403)
Associate’s degree	0.143	(0.022)	0.640	(0.047)	0.403	(0.072)	0.087	(0.282)
Bachelor’s degree	0.163	(0.021)	0.877	(0.045)	0.462	(0.068)	0.206	(0.404)
Master’s degree	0.185	(0.022)	1.101	(0.047)	0.619	(0.076)	0.091	(0.288)
Prof. degree	0.176	(0.030)	1.286	(0.068)	0.419	(0.119)	0.013	(0.114)
Ph/D	0.265	(0.026)	1.273	(0.065)	0.842	(0.128)	0.014	(0.118)
Race/ethnicity
Black non− Hispanic	−0.057	(0.012)	−0.135	(0.021)	−0.133	(0.040)	0.130	(0.336)
Hispanic	−0.036	(0.011)	−0.125	(0.021)	−0.074	(0.036)	0.170	(0.376)
Asian	−0.122	(0.016)	−0.017	(0.032)	−0.381	(0.051)	0.062	(0.240)
Other race	−0.083	(0.022)	−0.099	(0.041)	−0.170	(0.070)	0.024	(0.155)
Age
25–34	0.144	(0.014)	0.390	(0.026)	0.417	(0.042)	0.223	(0.416)
35–44	0.176	(0.014)	0.657	(0.025)	0.666	(0.044)	0.203	(0.402)
45–54	0.202	(0.013)	0.708	(0.025)	0.793	(0.042)	0.213	(0.409)
55–64	0.094	(0.014)	0.697	(0.026)	0.498	(0.041)	0.196	(0.397)
Selection identifiers
Family size					0.034	(0.014)	2.926	(1.628)
Kids < 18 years old					−0.077	(0.019)	0.767	(1.118)
Other household income					0.000	(0.000)	5108	(12,797)
Other household income squared					0.000	−2.6E-11	1.90E + 08	−5.E + 09
Selection parameters
/athrho					0.172	(0.033)
/lnsigma					−0.530	(0.015)
rho					0.170	(0.032)
sigma					0.589	(0.009)
lambda					0.100	(0.018)
Dependent variables
Employment							0.684	(0.465)
Ln(hourly pay)							2.892	(0.731)

Standard errors in parentheses in columns 1–3