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Table A-18. Estimated equations and model statistics for full-time and part-time enrollment rates of women at postsecondary degree-granting institutions |
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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 | -9.56 | 0.158 | -60.53 | 1.00 | 1.25~ |

Intercept term for 18-year-olds | -6.78 | 0.139 | -48.90 | ||

Intercept term for 19-year-olds | -6.64 | 0.133 | -49.80 | ||

Intercept term for 20-year-olds | -6.73 | 0.134 | -50.15 | ||

Intercept term for 21-year-olds | -6.95 | 0.134 | -51.71 | ||

Intercept term for 22-year-olds | -7.60 | 0.136 | -55.88 | ||

Intercept term for 23-year-olds | -8.10 | 0.138 | -58.60 | ||

Intercept term for 24-year-olds | -8.48 | 0.139 | -60.98 | ||

Intercept term for 25- to 29-year-olds | -9.05 | 0.141 | -64.01 | ||

Intercept term for 30- to 34-year-olds | -9.75 | 0.139 | -69.92 | ||

Intercept term for 35- to 44-year-olds | -9.97 | 0.140 | -71.25 | ||

Log of three-period weighted average of per capita disposable income in 2000 dollars, using the present period and the previous two periods |
1.20 | 0.026 | 46.79 | ||

Log age-specific unemployment rate for women | 0.33 | 0.035 | 9.36 | ||

Part-time |
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Intercept term for 17-year-olds | -11.54 | 0.567 | -20.37 | 0.99 | 1.86* |

Intercept term for 18-year-olds | -8.71 | 0.313 | -27.83 | ||

Intercept term for 19-year-olds | -8.17 | 0.302 | -27.06 | ||

Intercept term for 20-year-olds | -8.33 | 0.299 | -27.89 | ||

Intercept term for 21-year-olds | -8.35 | 0.294 | -28.37 | ||

Intercept term for 22-year-olds | -8.53 | 0.295 | -28.90 | ||

Intercept term for 23-year-olds | -8.59 | 0.297 | -28.96 | ||

Intercept term for 24-year-olds | -8.66 | 0.300 | -28.87 | ||

Intercept term for 25- to 29-year-olds | -9.08 | 0.306 | -29.62 | ||

Intercept term for 30- to 34-year-olds | -9.51 | 0.305 | -31.22 | ||

Intercept term for 35- to 44-year-olds | -9.16 | 0.308 | -29.79 | ||

Log of three-period weighted average of per capita disposable income in 2000 dollars, using the present period and the previous two periods |
1.04 | 0.047 | 22.03 | ||

Log unemployment rate | 0.17 | 0.023 | 7.15 | ||

Autocorrelation coefficient for 17-year-olds | 0.85 | 0.070 | 12.16 | ||

Autocorrelation coefficient for 18-year-olds | 0.78 | 0.079 | 9.87 | ||

Autocorrelation coefficient for 19-year-olds | 0.77 | 0.075 | 10.34 | ||

Autocorrelation coefficient for 20-year-olds | 0.65 | 0.105 | 6.18 | ||

Autocorrelation coefficient for 21-year-olds | 0.33 | 0.128 | 2.58 | ||

Autocorrelation coefficient for 22-year-olds | 0.49 | 0.097 | 5.04 | ||

Autocorrelation coefficient for 23-year-olds | 0.55 | 0.075 | 7.32 | ||

Autocorrelation coefficient for 24-year-olds | 0.75 | 0.061 | 12.30 | ||

Autocorrelation coefficient for 25- to 29-year-olds | 0.87 | 0.035 | 25.13 | ||

Autocorrelation coefficient for 30- to 34-year-olds | 0.89 | 0.025 | 35.24 | ||

Autocorrelation coefficient for 35- to 44-year-olds | 0.89 | 0.027 | 32.56 |

* 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 2010 and that for the part-time equation was from 1981 to 2010. The number of observations for the full-time equation is 341 and the number of observations for the part-time equation, after the correction for autocorrelation, is 330. 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, 1980–2010. (This table was prepared February 2012.) |