June 1, 2017

(1) Submitted HHK estimates made use of version 3.1.07 (28Jul2013) of ivreg2 and Stata 14. Estimates will differ slightly with later version 4.1.10 (9Feb2016) due to an adjustment to standard errors.

(2) Bootstrap estimates report the whole sample N (e.g. 8,925) - the correct N was manually changed in the paper tables.  