Table 1 The results of the difference-in-difference model
Births with Shanghai and non-Shanghai household registration | Births with Shanghai household registration | |||||
|---|---|---|---|---|---|---|
Estimate | Std. Error | P-value | Estimate | Std. Error | P-value | |
Intercept | 2184.94 | 67.49 | 2.00E-16 | 1286.04 | 44.94 | 2.00E-16 |
partial two-child policy | 261.08 | 71.58 | 3.30E-04 | 150.58 | 47.66 | 1.80E-03 |
universal two-child policy | 331.20 | 73.20 | 9.85E-06 | 222.63 | 48.75 | 8.18E-06 |
parity | − 1238.40 | 43.54 | 2.00E-16 | − 1098.55 | 28.99 | 2.00E-16 |
parity∗partial two-child policy | 164.56 | 100.88 | 0.10 | 189.82 | 67.18 | 5.15E-03 |
parity∗universal two-child policy | 425.34 | 103.13 | 5.25E-05 | 331.50 | 68.68 | 2.57E-06 |
Jan | 0 | – | – | 0 | – | – |
Feb | − 152.45 | 88.69 | 0.09 | −54.80 | 59.06 | 0.35 |
Mar | 20.25 | 88.69 | 0.82 | 9.45 | 59.06 | 0.87 |
Apr | − 113.70 | 88.69 | 0.20 | −77.25 | 59.06 | 0.19 |
May | −70.25 | 88.69 | 0.43 | −64.95 | 59.06 | 0.27 |
Jun | −1.05 | 88.69 | 0.99 | −22.25 | 59.06 | 0.71 |
Jul | 92.70 | 88.94 | 0.30 | 4.11 | 59.23 | 0.94 |
Aug | 167.20 | 88.94 | 0.06 | 36.96 | 59.23 | 0.53 |
Sep | 115.10 | 88.94 | 0.20 | 26.51 | 59.23 | 0.65 |
Oct | 193.05 | 88.94 | 3.10E-02 | 29.31 | 59.23 | 0.62 |
Nov | 253.60 | 88.94 | 4.76E-03 | 53.06 | 59.23 | 0.37 |
Dec | 177.16 | 88.85 | 4.74E-02 | 30.91 | 59.16 | 0.60 |