Abortion Reduces Violent Crime?

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CarbineCaleb

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Perhaps people have heard of Steven Levitt, or his new book, "Freakonomics"... it is wide ranging in provocative topics, among the most intriguing is his conclusion that the reduction in U.S. violent crime is due to the legalization of abortion! While this may sound farfetched at first (did to me) I've heard the man interviewed at length, and he had actually he had some quite compelling and multiple reasons for coming to this conclusion, and many examples of hard data on large systems to support it. I won't try to reproduce his arguements regarding this here, but will include an excerpt from a review on "Freaknomics" published in the conservative magazine "The Economist", below, which also discusses this...

From: http://www.economist.com/printedition/displayStory.cfm?Story_ID=3960469

"One of his best-known, and in some quarters notorious, findings concerns America's falling crime-rate during the 1990s. Towards the end of that decade, confounding the expectations of most analysts, the teenage murder rate fell by more than 50% in the space of five years; by 2000, the book notes, the overall murder rate was at its lowest for 35 years. Other kinds of crime fell too. Why? Some gave the credit to economic growth; others to gun control; still others to new methods of policing, or to greater reliance on imprisonment, or to increasing use of the death penalty, or to the ageing of the population.

Mr Levitt goes carefully through these various explanations, checking them against the evidence. He finds that some of them do offer a partial explanation (more jail time, for instance), whereas others do not (greater use of the death penalty, new policing methods). But the most intriguing finding was that one of the most powerful explanations had not even been broached. That explanation was abortion.

The reasoning is simple enough. In January 1973, the Supreme Court made abortion legal throughout the United States, where previously it had been available in only five states. In 1974, roughly 750,000 women had abortions in America; by 1980, the number was 1.6m (one abortion for every 2.3 live births). “What sort of woman was most likely to take advantage of Roe v Wade?” the book asks. “Very often she was unmarried or in her teens or poor, and sometimes all three...In other words, the very factors that drove millions of American women to have an abortion also seemed to predict that their children, had they been born, would have led unhappy and possibly criminal lives...In the early 1990s, just as the first cohort of children born after Roe v Wade was hitting its late teen years—the years during which young men enter their criminal prime—the rate of crime began to fall.”

The theory is the easy part, once you dare to articulate it. Testing it is quite another matter. But the book moves methodically and persuasively through the statistical evidence. It turns out, for instance, that crime started falling earlier in the states that legalised abortion before Roe v Wade; that the states with the highest abortion rates saw the biggest drops in crime (even controlling for other factors); that there was no link between abortion rates and crime before the late 1980s (when unborn criminals, as it were, first began to affect the figures); and that a similar association of crime and abortion has been found in other countries."
 
Ahhh, well, that is of course possible... but, as someone who interprets data for a living (and yeah I am published in peer reviewed journals and have developed novel techniques as well as applied existing ones), I have the following remarks:

- One can evaluate the probability of a false correlation, based on the apparent correlation found, and sample size - it's pretty straightforward.
- It's important to have large sample sizes, and unbiased experimental designs
- It's important to have not only an apparent mathematical correlation, but also a plausible mechanism for the relationship's existance to support it

I haven't seen the original scholarly papers by Levitt on this, but from what I have seen so far at least, I haven't seen any problems, and this guy is no amateur, and no dummy. He is also, by the way, not advocating abortion, so there is not a political/social motivation - in his interview he said simply "Of course not, there were more people killed in those abortions than were saved in the crime reduction" (using the classical utility theory) ;) . He just looks for interesting phenomena. Although I don't think this work proves 100% his case, any more so than any such work does... after listening to him explain it, I actually believe the arguement is not only surprising, but has merit.
 
Silver Bullet - what is a "Republican school"? Regarding "I'm guessing abortion reduces liberals."...frankly, I can't even understand what that means, except it sounds awfully ugly. Are you trying to say that the only good liberal is a dead liberal?
 
Good points, jonathon, those are classical liberal heroes alright - you forgot Bill Clinton though, he was even more heinous than the others you named, and more recent in memory. I am glad we can have such a mature and intelligent discussion here. This is much deeper and more open-minded than the discussion in "The Economist".
 
Long Path, can you give me an ad hoc translation of "Post hoc, ergo propter hoc"?
"After this, therefore because of this." It's a form of logical fallacy. Basically means that correlation equals causation, which we know to be false. Example: Sales of ice cream go up during the summer. Muggings go up during the summer. Therefore, ice cream causes muggings. (No-- but they are both correlated to the fact that the temperatures are warmer during the summer, which gets people out.)
 
Consider this:

Global warming increased (supposedly) throughout the 90's. Crime dropped. Therefore, global warming stops crime.

See? I can make up BS facts too.
 
Uhhh, I think I get this business about correlation and causation. I don't know if anyone actually read my post (or even all the way through an excerpt of a review of a book).... but I am a PhD scientist, and I was asked to write a graduate text on data interpretation by the largest publisher of technical books, so, believe it or not, I have heard that before. I'm putting words in his mouth, but I suspect that Steven Levitt has heard that before.

So, I was hoping for a little more than a lot of mud slinging here, I really was... this political portion at least of the firing line, seems to consist of little more than name calling and hate speech - I learned today here that people with brown skin are genetically inferior, for example. And in this thread, I thought I'd try to be optimistic, point up some groundbreaking work that has a lot of intellectuals talking... and the responses here are Hitler, Stalin, Mao, liberals better dead, bull****...

Moderator, feel free to close this thread - nothing happening here.
 
CarbineCaleb,

It would be of help if you linked the posts that said that people with brown skin were inferior and all the other things that you libeled against the members upon the board.

We deal in facts here, and we do have a bit of emotion that goes along with it. We are no different in our opinions then those on the Democratic Underground, yet we use facts, while they use nothing but emotion.

If a member has slandered a race or a person in an unjust way, please post the link to the post and the admins/mods will deal with that/those people as needed.

To be simply waved off as ignorants without some sort of proof, or better yet, links, to those posts which have offended you doesn't give credence to your words.

Wayne
 
Correct me if im wrong, but i thought Hitler was ultra conservative. He was a Facist (spelled wrong probably). That is bout as far Right as it gets. Yes the Stalin and Mao bit was right about being liberal because Communism is bout as far Left as it gets. The two, Facist and Communist really didnt get along.
 
Only going to post this once, so it doesn't go off topic.

Hitler was the leader of The National Socialists Workers Party, or the acronym in German was Nazi. His beliefs and his methods of government were nearly the same as Stalinist Russia and Maoist China. Only difference is, Hitler was a racist. Stalin and Mao hated anyone that opposed them. Other than that, Stalinist Russia was a hell of a lot worse than Nazi Germany.

One other thing to add, the defination of being "on the right" or "ultra conservative" is to be against big government. Hitler was a big government supporter.

An interesting theory I wrote about in a paper was on how World War 2 was nothing more than the power struggle between two men, Hitler and Stalin.
 
Are you trying to say that the only good liberal is a dead liberal?
Nope, didn't say anything like that.

I'm saying that from a statistical standpoint,

IF liberals are more likely to favor abortion than conservatives, and

IF those favoring abortion are more likely to have one than those who oppose them, and

IF children of liberals are more likely to grow up liberal than children of conservatives,

THEN more liberals (if they had been allowed to grow to voting age) are being aborted than conservatives.

Why would you read something totally different into it ?
 
I've heard the man interviewed at length, and he had actually he had some quite compelling and multiple reasons for coming to this conclusion,
So did David Duke

I got it on first read Silver Bullet
 
Caleb-
We can't police everyone's opinion. Discard those that are of no value to you. Respond to the rest. That's the best suggestion I can provide.

I'm also pretty well versed in Statistical Analysis. While I'm not a Ph. D, I did pay a high dollar school of Public Health a goodly sum to get to play with numbers. On the face of it, here's what I don't understand:
Despite Levitt's observation that Abortion was practiced to a higher degree among unwed mothers and the poor, that group has grown dramatically in numbers since the 70's. If that very group's children are more likely to commit violent crimes, we'd expect the acts would grow in the same direction.

Therefore, if we're to take his hypothesis at face value, we'd expect to see an INCREASE in murder rates.

Just what am I missing?
Rich
 
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