Virginia Tech Shootings — Did Gun Control Help or Hinder?

17 04 2007

Virginia Tech, presumably like most American universities, prohibits guns on campus. Did this help the gunman achieve such a hideous body count? Did he count on this as he planned his mission, and later coolly implemented it?

From what I’ve been reading today, it would appear that the shooter only planned minimally. Certainly he was well armed — two guns, at least one of which was 9mm, and lots of extra ammunition — and he knew the dorm where his first target lived (although some reports say that she was not there, so he just shot her roommate and a residential advisor responding to the commotion). He later went to a classroom building where she was likely to be present, but he didn’t know where, so he just randomly checked classrooms and shot people within them. Although he was calm and cold-blooded, he really didn’t have that good of a plan to get somebody specific, if that was indeed his plan. The rules of gun possession on campus were probably not something that rose high in his consciousness during his planning.

So what would have happened without the rules? Once again, we can only speculate. If some students or staff did normally carry or stash weapons, perhaps with concealed weapon permits, it seems likely that at least one of them would have interrupted the shooter’s spree sooner than he did himself. Probably not in the dorm, but somewhere in the classroom building. Not all the weapons-carriers would be heroic types; not all would even be on “the good guys” team; but probably someone would have taken matters into their own hands. Many people likely would have been shot before anyone would have been able to respond. But without any weapons available (except perhaps to another law-breaker), the odds were close to — or exactly — zero that anyone would or could respond to the shooter’s rampage.

On the other hand (there always IS another side), what would happen if guns were allowed on this campus? Blacksburg is not exactly a large metropolis; it is in the middle of part of the country where hunting, privacy rights, and even rebellion have been part of the local culture for centuries. Perhaps the presence of weapons on a university campus, combined with growing but immature minds, and the volatility of new and different social situations would lead to occasional small gunfire incidents. Maybe, in the long run, the death toll would be similar to this rampage. Or maybe not. It’s close to impossible for us to know. Twenty small shooting incidents at campuses across the country don’t make the same lasting headlines as one big incident, do they?





Fallacy of “immigrants have lower incarceration rates” study

5 03 2007

Last week, I read a few articles based on a 2/27 release from the Immigration Policy Center, telling us how new immigrants, whether legal or illegal, had lower incarceration rates than those with established U.S. residence, and that long-term residents and citizens have the highest incarceration rates. The authors’ conclusion was that people become more crime-prone as they live in U.S. society, rather than the popular perception that immigrants bring crime and criminal behavior with them.

There are many logical fallacies to this reasoning, but I’ll just start with one. Think of it this way: name a class of people who cannot immigrate into the U.S. Answer: “incarcerated people.” So the incarceration rate is exactly zero for brand-spanking new immigrants, and can only go up. So the whole report is useless.

A better study would have been to compare incarceration histories of people in the various groups, although this stillwould proabably be fairly useless since other countries likely have different success rates of locking up criminals, different sentencing, and even different survival rates of prisoners.

I’m not taking sides on whether the popular perception is true or not; that’s not my point.

Open fire.





Most states are purple

19 02 2007

About a year and a half ago (August 2005), having had discussions with many people about the supposedly new polarization of America’s population into red and blue states, and looking for a better visualization of the actual results, I was pleased to find the following website. The authors at Univ. of Mich. carefully describe some more accurate ways of portraying the proportions of votes in the last presidential election, where — like in most elections — the majorities were as often slim as they were wide. For the explanation behind the attached purple proportional cartogram, please see http://www-personal.umich.edu/~mejn/election/.

This sequence shows a progression from winner-takes-all state votes in 2004, to county votes, to shading by proportion of votes, to scaling the counties by the number of votes in them.

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Having recently returned to my home state — long known for its extreme conservatism — after an absence of almost eight years, I was surprised at the broad mix of colors there, and particularly by the fact that my county was NOT the reddest county on the map…. though it was still quite non-blue. On the other hand, some places are just plain predictable — e.g. Provo and S.F./Berkeley.

At the time, I asked the authors about extending the study to several previous elections, and then devising a visually informative method of displayingtrends and changes over time (or we could make an animated GIF, I suppose). But I received no response. I guess it takes a lot of grad students to enter all that data… ;o}