Table 3:

Results from discrete-time hazard models predicting the transition to second birth

Variable	M1	M2	M3	M4	M5	M6	M7
Wife’s age	−0.102 [−0.130, −0.074]	−0.105 [−0.133, −0.077]	−0.097 [−0.124, −0.069]	−0.100 [−0.128, −0.073]	−0.105 [−0.133, −0.077]	−0.101 [−0.129, −0.073]	−0.107 [−0.135, −0.078]
Husband’s age	−0.012 [−.039, 0.014]	−0.014 [−0.040, 0.013]	−0.017 [−0.042, 0.009]	−0.014 [−.040, 0.012]	−0.017 [−.042, 0.009]	−0.015 [−.041, 0.010]	−0.016 [−0.043, 0.011]
Sex of first child (1=male)	−0.141 [−.283, 0.001]	−0.142 [−0.284, 0.000]	−0.151 [−0.293, −0.009]	−0.150 [−0.292, −0.008]	−0.150 [−0.292, −0.008]	−0.157 [−0.299, −0.015]	−0.147 [−0.290, −0.004]
Region
Seoul (omitted)
Metropolitan cities	0.066 [−.142, 0.274]	0.088 [−0.122, 0.298]	0.050 [−0.159, 0.258]	0.060 [−.148, 0.268]	0.070 [−.138, 0.278]	0.051 [−.158, 0.261]	0.077 [−0.135, 0.289]
Other areas	−0.009 [−.201, 0.182]	0.002 [−0.191, 0.194]	−0.025 [−0.216, 0.166]	−0.012 [−.203, 0.179]	−0.007 [−.197, 0.184]	−0.015 [−.207, 0.177]	−0.013 [−0.207, 0.181]
Time since first marriage
0–1 year (omitted)
2–3 years	0.433 [0.271, 0.595]	0.441 [0.279, 0.604]	0.440 [0.277, 0.602]	0.432 [0.270, 0.594]	0.430 [0.268, 0.593]	0.430 [0.267, 0.592]	0.453 [0.289, 0.617]
4–5 years	−0.202 [−.437, 0.034]	−0.180 [−0.416, 0.056]	−0.198 [−0.433, 0.037]	−0.212 [−.446, 0.021]	−0.208 [−.442, 0.025]	−0.213 [−.447, 0.021]	−0.148 [−0.387, 0.091]
6+ years	−1.738 [−2.096, −1.380]	−1.708 [−2.066, −1.350]	−1.779 [−2.133, −1.425]	−1.789 [−2.141, −1.437]	−1.762 [−2.115, −1.408]	−1.784 [−2.138, −1.430]	−1.647 [−2.009, −1.285]
Wife’s educational attainment
Less than high school	−0.532 [−.088, 0.023]						−0.320 [−0.928, 0.289]
High school (omitted)
Some college / junior college	0.090 [−.087, 0.267]						0.005 [−0.188, 0.198]
University or more	0.094 [−.084, 0.272]						−0.057 [−0.282, 0.169]
Husband’s educational attainment
Less than high school		−0.391 [−0.880, 0.099]					−0.166 [−0.704, 0.372]
High school (omitted)
Some college / junior college		0.086 [−0.108, 0.279]					0.040 [−0.167, 0.248]
University or more		0.197 [0.021, 0.373]					0.181 [−0.040, 0.402]
Wife’s employment status
Non-employment (omitted)
Standard employment			−0.153 [−0.324, 0.018]				−0.228 [−0.410, −0.047]
Nonstandard employment			−0.071 [−0.439, 0.297]				−0.056 [−0.428, 0.317]
Self-employment			−0.229 [−0.533, 0.075]				−0.223 [−0.538, 0.093]
Husband’s employment status
Non-employment (omitted)
Standard employment				0.375 [0.010, 0.739]			0.260 [−0.116, 0.636]
Nonstandard employment				0.109 [−.386, 0.605]			0.114 [−0.386, 0.615]
Self-employment				0.364 [−.034, 0.763]			0.318 [−0.094, 0.730]
Annual household income (logged)2					0.123 [0.017, 0.229]		0.095 [−0.031, 0.221]
Homeownership
Homeowner (omitted)
Jeonse (key money)						−0.047 [−.203, 0.109]	−0.020 [−0.178, 0.138]
Weolse (monthly rent)						−0.318 [−0.603, −0.034]	−0.207 [−0.500, 0.086]
Other						−0.019 [−.338, 0.299]	0.016 [−0.305, 0.336]
Constant	2.148 [1.459, 2.836]	2.211 [1.521, 2.900]	2.246 [1.567, 2.924]	1.875 [1.117, 2.633]	2.019 [1.315, 2.722]	2.335 [1.617, 3.052]	1.916 [1.094, 2.739]
Person-year observations	7,938	7,938	7,938	7,938	7,938	7,938	7,938

¹Dichotomous variable

²Annual household income is measured in 1,000,000 KRW, approximately 830 USD.

95% confidence intervals in brackets.