The supplemental .zip archive for this publication contains the following files. 
Stata files were created using Version 13 and may not be compatible with earlier versions.


1. Stata program file to produce main analysis estimates
      spacing_main_estimates.do 


2. Stata program file to produce supplementary analysis estimates
      spacing_supp_estimates.do 


3. Stata data file, NLSY79 data covering 1979-2010 for women with at least two children
      spacing_analytic.dta