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Projections of Education Statistics to 2014, Thirty-third Edition, September 2005 - Equations for full-time and part-time college enrollment rates of women

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Table A5. Equations for full-time and part-time college enrollment rates of women
Independent variable Coefficient Standard error T-statistic R2 D.W. statistic
Full-time
Age17 -8.88 0.55 -16.2 0.99 2.30
Age18 -6.02 0.23 -26.7
Age19 -5.85 0.17 -35.2
Age 20 -6.04 0.16 -38.0
Age 21 -6.24 0.16 -39.1
Age 22 -6.97 0.19 -36.9
Age 23 -7.38 0.19 -39.7
Age 24 -7.66 0.17 -46.0
Age 25 -8.08 1.56 -5.2
Age25-29-9.08 0.16 -58.3
Age35-44-9.31 0.16 -59.6
LNRYPDRNMA1.06 0.04 27.1
LNRUF 0.26 0.05 5.2
Rho170.90 0.07 13.5
Rho180.81 0.09 8.7
Rho190.13 0.15 0.9
Rho20-0.23 0.16 -1.4
Rho210.07 0.14 0.5
Rho220.75 0.09 8.3
Rho230.73 0.10 7.2
Rho240.58 0.12 4.9
Rho25-290.97 0.13 7.4
Rho30-340.02 0.17 0.1
Rho35-44 -0.18 0.12 -1.4
Part-time
Age17 -8.84 0.80 -11.1 0.76 2.4
Age18 -5.82 0.21 -27.1
Age19 -5.65 0.23 -24.4
Age 20 -5.58 0.21 -26.7
Age 21 -5.70 0.21 -27.0
Age 22 -5.56 0.21 -26.5
Age 23 -5.87 0.21 -27.9
Age 24 -6.05 0.22 -27.7
Age 25 -6.02 0.21 -28.3
Age25-29-6.30 0.24 -26.4
Age35-44-6.01 0.22 -27.0
LNRYPDRNMA0.70 0.04 17.2
LNRUF 0.19 0.04 4.7
Rho170.61 0.12 5.1
Rho180.30 0.15 2.0
Rho190.61 0.11 5.7
Rho20-0.14 0.12 -1.2
Rho210.09 0.09 1.1
Rho220.13 0.12 1.1
Rho230.01 0.12 0.1
Rho240.53 0.12 4.4
Rho25-290.38 0.12 3.1
Rho30-340.74 0.07 9.9
Rho35-44 0.67 0.10 6.5
R2 = Coefficient of determination.
D.W. statistic = Durbin-Watson statistic.

Where:
   AGE(age) = Enrollment rate by age.
   Rho(age) = Autocorrelation coefficient for each age.
   LNRUM = Log unemployment rate for men.   
   LNRYPDRNMA = Log of three-period weighted average of per capita real disposable income.

NOTE: The regression method used to estimate the full-time and part-time equations was pooled seemingly unrelated regression with first-order autocorrelation correction. The time period used to estimate the equations is from 1975 to 2002. The number of observations is 297. For additional information, see M. D. Intriligator, Econometric Models, Techniques, & Applications, New Jersey: Prentice-Hall, Inc., 1978, pp. 165-173.
SOURCE: U.S. Department of Education, National Center for Education Statistics: Integrated Postsecondary Education Data System, "Fall Enrollment Survey" (IPEDS-EF:89-99), and Spring 2001 through Spring 2003; and Enrollment in Degree-Granting Institutions Model, 1980-2002. (This table was prepared October 2004.)

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