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Table 6

Twin effect, surviving children

SampleExpected α, No ControlExpected α, ControlαSEN
Pre-Fertility Decline 
  France, pre-1789 0.24 0.04a 0.37 0.11 24,609 
  England, CAMPOP 0.22a 0.05 0.00 0.08 76,239 
  England, pre-1880 0.45 0.08a 0.70 0.13 52,706 
  Québec 0.33 0.05a 0.24 0.05 324,202 
Post-Fertility Decline 
  France, post-1800 0.12 0.03a 0.37 0.15 8,132 
  England, 1900–1949 0.52 0.15a 0.36 0.10 27,288 
SampleExpected α, No ControlExpected α, ControlαSEN
Pre-Fertility Decline 
  France, pre-1789 0.24 0.04a 0.37 0.11 24,609 
  England, CAMPOP 0.22a 0.05 0.00 0.08 76,239 
  England, pre-1880 0.45 0.08a 0.70 0.13 52,706 
  Québec 0.33 0.05a 0.24 0.05 324,202 
Post-Fertility Decline 
  France, post-1800 0.12 0.03a 0.37 0.15 8,132 
  England, 1900–1949 0.52 0.15a 0.36 0.10 27,288 

aHypothesized coefficient is rejected at p = .05.

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