With Christine Neill, an expatriate Australian living in Canada, I set about analysing data on the buyback. One result was rock solid. In the decade before the gun buyback, Australia averaged more than one mass shooting per year (a mass shooting is where five or more people are killed). Between 1987 and 1996, a total of ninety-four victims were killed in mass shootings. Apart from Hoddle Street and Port Arthur, there were also mass shootings in the Top End (Northern Territory and Western Australia), Canley Vale (New South Wales), Queen Street (Victoria), Oenpelli (Northern Territory), Surry Hills (New South Wales), Strathfield (New South Wales), Terrigal (New South Wales), Cangai (New South Wales) and Hillcrest (Queensland).
In the decade after the laws were changed, there was not a single mass shooting in Australia. The chance of this change being due to luck alone is less than one-in-a-hundred. Judged by whether it prevented mass shootings, the Australian gun buyback was an unmitigated success. Yet impressive though this is, the number of people killed in mass shootings has never been particularly large. Even during the worst period for gun massacres, the odds of being killed in a mass shooting were about as large as the chances of being killed by a lightning strike.
http://insidestory.org.au/the-upsides-of-the-buyback
The I was Andrew Leigh eminent scholar who has done extensive research.
I can't find the credentials for Mark Antonio Wright the author of your paper.
And before anyone thinks I am against guns we are farmers with licensed guns.
Again I state the comments made by Ted Cruz re our gun laws were not true not whether our gun laws would work in the U.S.