Bureau of Transportation Statistics (BTS)
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Table 2 - A Two-Stage Least Squares Estimation of the Accessibility and Employment Functions

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Accessibility (equation 2)
Variable Parameter
Mode  
car 0.212161
transit 0.806815
walk 0.413026
others NS
Departure  
12:00-5:59 NS
6:00-6:29 NS
6:30-6:59 -.140844
7:00-7:29 -.198046
7:30-7:59 0.286117
8:00-8:29 0.103212
8:30-8:59 -.126580
9:00-9:59 -.137373
10:00-11:59 -.149063
Car ownership  
0 cars -.042637
1 car -.004050
2+ cars 0.017643
Income, in $ thousands  
0-9.9 0.571909
10-19.9 0.521587
20-29.9 NS
30-34.9 0.340198
35-49.9 0.367278
50-74.9 0.189123
75.0+ -.012188
Constant 44.3827
R-Squared .362

 

Employment (equation 3)
Variable Type of job
Executive parameter
Type of job
Technician parameter
Type of job
Administrative parameter
Type of job
Transport parameter
Accessibility -.237740 -.187414 -.096016 -.079812
Wage rate        
(3) Construction NS .283052 NS NS
(4) Manufacture 1 .129783 .136822 .048485 NS
(5) Manufacture 2 NS .090696 NS .235875
(6) Transport .338492 NS .235395 .575081
(7) Communication NS NS NS NS
(8) Wholesale NS -.145514 .163956 .256606
(9) Retail .285929 NS NS NS
(10) FIRE .485281 .447685 .422971 NS
(11) Business and repair NS .347708 NS -.353465
(12) Personal Services NS -.142507 .068464 NS
(13) Entertainment .210809 NS .052301 NS
(14) Health NS .858439 .172036 .384054
(15) Education NS .122671 .074335 .179501
(16) Other .140571 -.143720 NS .454775
(17) Public administration -.141837 .00407 .161577 NS
Education:        
Less than 9th grade NS -.275950 NS NS
Less than 12th grade -.235460 .408651 NS -.684124
High school diploma NS -.326228 .168903 NS
No college degree NS NS .179568 .212217
Associate degree .146286 NS .166667 -.268634
Bachelor degree NS -.224551 NS -.288028
Graduate degree NS .187507 NS -.538609
Childrens' age:        
Under 3 NS NS NS -.258383
3-5 NS -.235078 NS -.275407
6-11 NS -.159645 -.132387 .455364
12-17 NS -.425830 .130015 NS
Income, in $ thousands        
0-9.9 NS .089148 -.055030 NS
10-19.9 NS .155627 NS NS
20-29.9 .058064 NS -.043658 NS
30-34.9 .093460 NS NS NS
35-49.9 NS NS NS NS
50-74.9 .082358 NS -.158341 NS
75.0+ NS NS NS .121987
Constant -4.286843 6.516566 -25.94905 -.841860
R-Squared 0.866 0.869 0.953 0.765

Note: Parameters shown are adjusted coefficients (see text) and significant at 0.05 level or better.
NS = not significant.