The third birth in Sweden.

  title={The third birth in Sweden.},
  author={James J. Heckman and James L. Walker},
  journal={Journal of population economics},
  volume={3 4},
"This paper considers the formulation, estimation and interpretation of microdynamic models of fertility. Our model explains parity choices, sterility, childlessness, interbirth intervals and initiation of pregnancy within a unified framework. We develop a general methodology for estimating the determinants of transition times to births of different orders. Our procedure incorporates time-varying explanatory variables and unobservables. We present conditions that justify conventional formulae… CONTINUE READING

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