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. 2012 Oct 4;23(3):458–464. doi: 10.1093/eurpub/cks127

Table 3.

Estimation results of bivariate probit model with selectivity correction and ordinary probit: male sample

Explanatory variables Bivariate probit with selectivity correction
Ordinary probit
Participate or not
Meeting the recommended level
Meeting the recommended level
Coefa. ME Coefa. ME Coefa. ME
Degree qualification 0.159*** 0.064
Employed −0.081* −0.032
Age −0.022*** −0.009 −0.017*** −0.004 −0.021*** −0.003
Access to vehicle −0.184** −0.047 −0.148** −0.026
Ethnicityb
    Mixed 0.130 0.033 0.016 0.003
    Asian −0.080 −0.018 −0.100 −0.016
    Black −0.042 −0.010 −0.104 −0.016
    Chinese −0.611** −0.104 −0.519** −0.060
Marital statusc
    Other 0.028 0.012
    Married (living) −0.106** −0.041
Income 0.000*** 0.000 0.000*** 0.000 0.000*** 0.000
Full time work −0.139** −0.055
No. of children 0.050 0.019***
Drinkers 0.135** 0.052
Smokers −0.215*** −0.085 −0.302*** −0.067 −0.304*** −0.045
Voluntary activity
Health statusd
    Good health 0.717*** 0.276 0.339** 0.050
    Fair health 0.431*** 0.163 −0.041 −0.022
    Obese −0.131*** −0.051 −0.301*** −0.065 −0.274*** −0.041
Seasonal effect e
    Summer 0.309*** 0.121 0.070 0.017 0.143** 0.025
    Spring 0.131** 0.052 0.101 0.025 0.131** 0.023
    Autumn 0.135*** 0.053 0.177** 0.044 0.172** 0.030
Region of residencef
    North east −0.405*** −0.159
    North west −0.239*** −0.095
    Yorkshire −0.179** −0.073
    East Midlands −0.128* −0.053
    West Midlands −0.132* −0.054
    East −0.074 −0.033
    London −0.268*** −0.107
    South west −0.102 −0.044
Constant 0.140 −0.263
Observations 6324 3425 6324
Rho 0.154 0.154
P = 0.524 P = 0.524

Coef, Coefficients; ME, Marginal effects.

a: The estimated parameters and asterisks show significance level of 1% (***), 5% (**) and 10% (*).

b: Reference category: white.

c: Reference category: single.

d: Reference category: poor health.

e: Reference category: winter.

f: Reference category: south east.

Hausman specification test (null hypothesis: difference in coefficients in two models is not systematic): Chi2 (7) = 10.13; P = 0.60.