Table 3

Twinning correlates

VariableFrance, HenryEngland, CAMPOPEngland, FOEQuébec, IMPQ
Mother’s Age –0.00005 0.0005** 0.0009** 0.0004** 
(0.003) (0.0001) (0.0001) (0.00003) 
Parity 0.03** 0.002** 0.004** 0.0006** 
(0.002) (0.0002) (0.0002) (0.00005) 
First to Second Birth Interval 0.002 –0.002* –0.002 0.00002 
(0.004) (0.001) (0.002) (0.00004) 
Literate Father 0.003 0.0001  0.0003 
(0.019) (0.002)  (0.0006) 
Literate Mother –0.0005 0.002  0.0008 
(0.026) (0.002)  (0.0007) 
ln(Wealth), Father   0.0001  
  (0.0003)  
Occupational Rank, Father   –0.000002 –0.005 
  (0.00004) (0.003) 
Educated Father   –0.004  
  (0.003)  
VariableFrance, HenryEngland, CAMPOPEngland, FOEQuébec, IMPQ
Mother’s Age –0.00005 0.0005** 0.0009** 0.0004** 
(0.003) (0.0001) (0.0001) (0.00003) 
Parity 0.03** 0.002** 0.004** 0.0006** 
(0.002) (0.0002) (0.0002) (0.00005) 
First to Second Birth Interval 0.002 –0.002* –0.002 0.00002 
(0.004) (0.001) (0.002) (0.00004) 
Literate Father 0.003 0.0001  0.0003 
(0.019) (0.002)  (0.0006) 
Literate Mother –0.0005 0.002  0.0008 
(0.026) (0.002)  (0.0007) 
ln(Wealth), Father   0.0001  
  (0.0003)  
Occupational Rank, Father   –0.000002 –0.005 
  (0.00004) (0.003) 
Educated Father   –0.004  
  (0.003)  

Note: Standard errors are shown in parentheses.

*p < .05; **p < .01

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