Pro-gun writers frequently make false accusations that researchers they oppose do not share their data. For example, Lott claimed that Ayres and Donohue’s data was not available even though it was on Ayres’ webpage.
Another example is Carl Moody, who claimed that Kellermann was lying because his data was not available. When I pointed out to Moody that Kellermann’s data had been available for years and years he refused to apologize to Kellermann.
In More Guns, Less Crime Lott also claimed that Kellermann’s data was unavailable, even though it was available on the web. This was explained to him on Usenet, but he insisted that something was missing while refusing to say what was missing.
In the comments to this post, Andrew Salemme gives another example. In Armed: New Perspectives on Gun Control, Don Kates claims that Kellermann only released the data for the 316 matched pairs used in his analysis. This is an extremely careless claim, since all he had to do was look at the data to see that it included information about 420 murder victims.