The supplemental .zip archive for this publication contains the following files.

Microlevel data for the study is only available through a process requiring approaval from Statistics Sweden and a Swedish ethical review board.

1. Stata program file to produce estimates for the manuscript. The do file also contains a description of the input data needed.
	Kolk_2015_IV.do	

2. Aggregated regression output for the stata code above. This data was used to produce Table 1.
	twinsT.csv

Stata files were created using Version 12 and used the ivreg2 and outreg2 packages.

helpfiles
http://www.repec.org/bocode/i/ivreg2.html
http://www.repec.org/bocode/o/outreg2.html