Regressions of Birth Spacing (Measured in Days) between the First Two Births
| Dependent Variable = Spacing in Days | First Children Born | |||
|---|---|---|---|---|
| 1978–1984 (1) | Pre-1980 (2) | Post-1980 | ||
| (3) | Next Sibling Born by 1985 (4) | |||
| Girl1st × Boy2nd | 3.97 (2.81) | 4.23 (3.42) | 3.80 (4.88) | −3.28 (3.01) |
| Girl1st | −15.51 (2.04)* | −16.61 (2.48)* | −13.17 (3.55)* | −9.52 (2.16)* |
| Boy2nd | −8.13 (1.98)* | −7.92 (2.42)* | −8.29 (3.42)* | 1.32 (2.11) |
| Adjusted R-squared | 0.06 | 0.06 | 0.05 | 0.07 |
| Sample size | 850,198 | 598,777 | 251,421 | 241,033 |
Notes: This table reports the OLS estimated coefficients for a regression of birth spacing between the first two births on their sex composition. We use the same sample as the regressions in Tables 6 to 11, except for 811 families whose second born children have missing or erroneous birthday information. We restrict the sample in Column 3 to those whose first child was born from 1980 onwards the sample in Column 4 to those whose first child was born from 1980 onwards and with the second birth prior to 1985. Additional covariates include the subject’s age and district of birth, indicators for urban, parents’ education and years of birth, mother’s age at first birth. Robust standard errors are reported in parentheses.
↵* indicates significance at the 5% level.