3% 'Super-Owner' story was 'broken' by The Guardian and The Trace:
https://www.thetrace.org/2016/09/harvard-northeastern-gun-ownership-survey-research/
Link to Northeastern's blurb about the 'study':
https://news.northeastern.edu/2016/...rms-added-to-us-gun-stock-over-past-20-years/
As for the actual 'study', apparently it has yet to be published...It is supposed to be published in 2017 by the 'Russell Sage Foundation'...
https://www.thetrace.org/2016/09/harvard-northeastern-gun-ownership-survey-research/
Link to Northeastern's blurb about the 'study':
https://news.northeastern.edu/2016/...rms-added-to-us-gun-stock-over-past-20-years/
As for the actual 'study', apparently it has yet to be published...It is supposed to be published in 2017 by the 'Russell Sage Foundation'...