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Table A-18. Estimated equations and model statistics for full-time and part-time college enrollment rates of women |
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Independent variable |
Coefficient |
Standard error |
t-statistic |
R^{2} |
D.W.statistic |
---|---|---|---|---|---|

Full-time |
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Intercept term for 17-year-olds | -9.48 | 0.181 | -52.48 | 1.00 | 1.29** |

Intercept term for 18-year-olds | -6.70 | 0.163 | -41.05 | ||

Intercept term for 19-year-olds | -6.58 | 0.159 | -41.37 | ||

Intercept term for 20-year-olds | -6.70 | 0.159 | -42.22 | ||

Intercept term for 21-year-olds | -6.92 | 0.159 | -43.57 | ||

Intercept term for 22-year-olds | -7.58 | 0.160 | -47.26 | ||

Intercept term for 23-year-olds | -8.08 | 0.162 | -49.98 | ||

Intercept term for 24-year-olds | -8.46 | 0.163 | -51.90 | ||

Intercept term for 25- to 29-year-olds | -9.05 | 0.164 | -55.20 | ||

Intercept term for 30- to 34-year-olds | -9.76 | 0.162 | -60.11 | ||

Intercept term for 35- to 44-year-olds | -9.98 | 0.163 | -61.28 | ||

Log of three-period weighted average of per capita | |||||

disposable income in 2000 dollars, using the present | |||||

period and the previous two periods | 1.17 | 0.031 | 37.27 | ||

Log age-specific unemployment rate for women | 0.28 | 0.041 | 6.79 | ||

Part-time |
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Intercept term for 17-year-olds | -11.18 | 0.500 | -22.38 | 0.99 | 1.88* |

Intercept term for 18-year-olds | -8.46 | 0.297 | -28.54 | ||

Intercept term for 19-year-olds | -7.95 | 0.287 | -27.73 | ||

Intercept term for 20-year-olds | -8.12 | 0.284 | -28.56 | ||

Intercept term for 21-year-olds | -8.12 | 0.280 | -29.06 | ||

Intercept term for 22-year-olds | -8.29 | 0.280 | -29.58 | ||

Intercept term for 23-year-olds | -8.36 | 0.282 | -29.63 | ||

Intercept term for 24-year-olds | -8.42 | 0.286 | -29.46 | ||

Intercept term for 25- to 29-year-olds | -8.88 | 0.295 | -30.08 | ||

Intercept term for 30- to 34-year-olds | -9.25 | 0.292 | -31.70 | ||

Intercept term for 35- to 44-year-olds | -8.95 | 0.296 | -30.23 | ||

Log of three-period weighted average of per capita | |||||

disposable income in 2000 dollars, using the present | |||||

period and the previous two periods | 1.01 | 0.044 | 22.70 | ||

Log unemployment rate | 0.14 | 0.024 | 5.85 | ||

Autocorrelation coefficient for 17-year-olds | 0.82 | 0.074 | 11.11 | ||

Autocorrelation coefficient for 18-year-olds | 0.75 | 0.082 | 9.11 | ||

Autocorrelation coefficient for 19-year-olds | 0.77 | 0.071 | 10.71 | ||

Autocorrelation coefficient for 20-year-olds | 0.60 | 0.105 | 5.74 | ||

Autocorrelation coefficient for 21-year-olds | 0.30 | 0.123 | 2.39 | ||

Autocorrelation coefficient for 22-year-olds | 0.44 | 0.097 | 4.57 | ||

Autocorrelation coefficient for 23-year-olds | 0.52 | 0.077 | 6.82 | ||

Autocorrelation coefficient for 24-year-olds | 0.74 | 0.063 | 11.74 | ||

Autocorrelation coefficient for 25- to 29-year-olds | 0.89 | 0.034 | 25.99 | ||

Autocorrelation coefficient for 30- to 34-year-olds | 0.89 | 0.026 | 33.81 | ||

Autocorrelation coefficient for 35- to 44-year-olds | 0.89 | 0.026 | 34.19 |

* p<.05. |
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** inconclusive | |||||

NOTE: R^{2} = Coefficient of determination. D.W. statistic = Durbin-Watson statistic, a test for autocorrelation among regression residuals. For more details see Johnston, J., and Dinardo, J. (1996). Econometric Methods. New York: McGraw-Hill.The regression method used to estimate the full-time equation was the pooled seemingly unrelated regression method. The regression method used to estimate the part-time equation was the pooled seemingly unrelated regression method with a first-order autocorrelation correction. The time period used to estimate the full-time equation was from 1980 to 2009 and that for the part-time equation was from 1981 to 2009. The number of observations for the full-time equation is 330 and the number of observations for the part-time equation, after the correction for autocorrelation, is 319. For additional information, see Intriligator, M.D. (1978). Econometric Models, Techniques, & Applications. New Jersey: Prentice-Hall, Inc., pp. 165–173. |
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SOURCE: U.S. Department of Education, National Center for Education Statistics, Enrollment in Degree-Granting Institutions Model, 1980–2008. (This table was prepared March 2011.) |