Comments, observations and thoughts from two bloggers on applied statistics, higher education and epidemiology. Joseph is an associate professor. Mark is a professional statistician and former math teacher.
Tuesday, November 15, 2011
How not to convince people
Not a good start for a dynamic movement seeking change.
Tone poem -- how Duncan Black and company missed the big picture
Take a look at this excerpt from All Things Considered:
RAZ: In the just short time we have left, E.J., I want to ask you about Penn State - both of you. Obviously, the university president and the head coach, Joe Paterno, were fired by the board of trustees.
Do you think they should've considered shutting down the program for a year?
DIONNE: Yeah. Well, you look at that indictment, I mean, what happened was hideous. What was done to kids, 10-year-old boy and others that young, was just awful. And you had an institution that seemed more interested in self-protection than anything else. And we've seen that before.
And I understand Joe Paterno is a much-loved figure in sports terms. He was one of the better college coaches. His kids graduated. But this entire episode is so ugly and it, again, you hate institutional protection over the interests of little kids.
RAZ: David.
BROOKS: Yeah, I guess think - it's I have a bigger view, which is that when we have a society where we don't know how to handle the concept of evil when we see it, we don't know how to deal with it, we're not really aware of it and people hid away. I do not think they should shut down the program, however. I think a lot of very honest football players have committed themselves to that program. I don't think they should be punished.
If you've followed any of the major debates going on now, you have to be discouraged by the lack of progress. You will see some good substantive arguments but more often the pundits will simply focus on maintaining the appropriate tone and making the right associations.
David Brooks is a master of this kind of punditry. That skill has allowed him to maintain his reasonable conservative persona under very difficult circumstances (look at what happened to David Frum). See how he hits both notes here, first chastising us for moral relativism then warning against excessive reaction. In terms of tone, this combination of conservative values and measured responses is almost perfect. As an argument, though, it's gibberish.
There is no way to reconcile the two sides here. You can't condemn society for lacking the strength and clarity of vision to deal with evil then recommend that we not punish an institution that tolerated and enabled genuine atrocities. Brooks, who is a very intelligent man, undoubtedly knows what he said makes no sense, but he also knows that, as long as maintains that proper tone, most people won't care.
Monday, November 14, 2011
Cross sectional reasoning
I highlighted one in particular: Astronomy and Astrophysics. Note that it has a 0% unemployment rate; in other words, last year everyone who majored in these fields got a job! Now, I find myself being a tad skeptical about this, but if there’s some weird thing going on with this survey, I can at least make the broad assumption that the relative job numbers are probably OK. Majoring in astronomy is still a good idea, and will strengthen your chances of getting a job after college.
I want to take this in a different direction. What this metric shows is that, if you were lucky enough to have majored in Astronomy in 2005 then you were very likely to be employed in 2010. It says nothing about what will happen to somebody who enters the program in 2011 and whether they will be employed in 2015.
See, I was actually a physics major in the mid 1990's, in a school with a large astrophysics group. I knew a lot of these students and even took classes with them. Do you know what they mostly ended up as: High School Teachers. Plus a few academics. At the time there was a terrible job placement rate in physics and we were all depressed by the poor employment outcomes. Using the tool, I see a 4.5% unemployment rate for physics, which does make me wonder how many astrophysicists are counted in this group.
But, in general, past performance is no guarantee of future employment. A depressed job market could easily have led to full employment years later, long after only the most dedicated students remained. I've seen this phenomenon in a lot of fields -- people go where the markets signal but, in education, the signals are lagging indicators.
So maybe we are seeing the unemployment ghettos of the future?
Another "It's too late tonight to do it justice..."
No, a science major does not guarantee you a job...
Sunday, November 13, 2011
I'm not knowledgeable enough to sufficiently mock this* #
* Yeah, it's a split infinitive. What are you, the grammar police?
# Now with no words omitted from the title.
Saturday, November 12, 2011
Libertarians in Space
In his speech, Cain praised President John F. Kennedy as a "great leader" for inspiring a national effort to put a man on the moon, a goal achieved when astronaut Neil Armstong stepped onto the moon's surface in 1969.I don't know what the reaction of the crowd was (the reporting wasn't that detailed) but I'd imagine it was friendly. You can usually get a warm response from a Republican crowd by coming out in favor of manned space exploration which is, when you think about, strange as hell.
"He didn't say, 'We might.' He didn't say, 'Let's take a poll,'" Cain said. "He said, 'We will.' And we did. Only for this president to move us back by canceling a major part of our space program."
Cain also criticized Obama for using Russian technology to ferry astronauts and cargo to the International Space Station.
"I can tell you that as president of the United States, we are not going to bum a ride to outer space with Russia," Cain said to loud applause. "We're going to regain our rightful place in terms of technology, space technology."
If you set out to genetically engineer a program that libertarians ought to object to, you'd probably come up with something like the manned space program. A massive government initiative, tremendously expensive, with no real role for individual initiative. Compared to infrastructure projects the benefits to business are limited. You could even argue that the government's presence in the field crowds out private development.
(Much has been made of the rise of private space firms, but barring a really big and unexpected technological advance, their role is going to be limited to either unmanned missions or human flights in low earth orbit for the foreseeable future.)
There have been efforts in libertarian-leaning organs (The Wall Street Journal, Reason, John Tierney's NYT columns) trying to argue that interplanetary exploration can be done on the cheap. These usually rely heavily on the blatant low-balling of Robert Zubrin* (Tierney, a science writer who has no grasp of science, made a particularly ripe mark), but even if we were to accept these numbers, it's still difficult to reconcile this kind of government program with libertarian values.
* On a related note, check out this other example of Zubrin's estimation skills.
Friday, November 11, 2011
Pre-blogging Jack Shafer
Here's Jack Shafer explaining how his intense antipathy toward plagiarism is all about the readers (via Salmon):
The plagiarist defrauds readers by leading them to believe that he has come by the facts of his story first-hand–that he vouches for the accuracy of the facts and interpretations under his byline. But this is not the case. Generally, the plagiarist doesn’t know whether the copy he’s lifted has gotten the story right because he hasn’t really investigated the topic. (If he had, he could write the story himself.) In such cases he must attribute the material he borrows so that at the very least the reader can hold somebody accountable for the facts in a story.Putting aside the fact that Shafer has never gotten that worked up about colleagues' inaccuracy (you'll notice he didn't jump on this story about his friend Gregg Easterbrook), there's an interesting game here of rhetorical Three-card Monte. The cards in this game are the three types of plagiarism: theft of ideas and interpretations; theft of facts and data; and theft of wording.
In the world of research, the first two are considered the most serious. Stealing the hypothesis of another paper or presenting someone else's data as your own is about the worst thing you can do. Lifting a passage of someone else's writing is frowned upon but prose style does not drive impact factors.
For journalists, the situation is exactly reversed. Reusing another writer's phrases is clearly considered the worst kind of plagiarism, perhaps the worst journalistic crime period. Stealing facts (such as using other people's reporting to cover an event) is seldom even mentioned except in the most flagrant of cases. As for appropriating ideas, the practice is so common as to almost be standard. Even those most modern of journalistic concepts, memes, are almost always based largely on the plagiarism of hypotheses and arguments.
Now, here's the part where the cards really start to move. Shafer's criticism only applies to the first two types of plagiarism, the two types he doesn't object to. (aren't the first two nested in the third? Sometimes, but Shafer apparently doesn't have a problem with borrowing and paraphrasing, it must be the not-paraphrasing part that bothers him). If Shafer really wants to convince us that borrowing without paraphrasing is more than journalist-on-journalist crime, he'll have to do better than that.
Thursday, November 10, 2011
Health Care Costs
You can see that not only is the United States the outlier when it comes to spending, but we are moving in the wrong direction: we are becoming more of a spending outlier, and we are drifting down from the average life expectancy into the lower group (currently surpassing only Turkey, Hungary, Mexico, Poland, and Czech Republic).
and
The other thing you see is that our life expectancy gain was the absolute lowest of the whole group (and we weren’t starting from a particularly high level, as you can see in the previous chart).
Ordinarily, you would think there should be convergence across countries. Since other countries spend less and live longer, you would think that we would learn from them—global competition, you know. But instead we’re moving the wrong way on both dimensions.
The article and neat charts are worth looking at in their entirety.
Now, it is true that there can be a lot of reasons for low life expectancy and high medical costs. It could be that the environment in the United States makes us much more accident prone, for example, requiring both higher spending and more fatalities.
But, in general, it is uncomfortable when the most important metric of health care outcomes (all cause mortality) is so uncorrelated with cost. This suggests the possibility of productivity improvements. I read a lot of the Incidental Economist, who try to explain these issues. But I admit that I tend to come away confused.
The major comparison is often Canada. It is a bad reference on a lot of levels (as they have their own issues). But they have similar culture, ethnic diversity, large geography, heavy use of cars, high levels of obesity and yet they are improving on both metrics (from a lower level of cost and higher life expectancy at baseline).
Why is health care the one area that we aren't willing to look at how other countries have been successful and try to steal ideas?
Wednesday, November 9, 2011
Old story, different hemisphere
Rob Schmitz: If you walk down the street in Shanghai, it's hard to miss the advertisements for college placement agencies. In big bold letters, they promise -- some even guarantee -- your child's admission to an American university. The price: $5,000, $6,000, sometimes $7,000.Jiang Xueqin is a well-known education reformer in China. He also heads the International division at Peking University High School -- one of China's best high schools. He has followed college placement agencies for years. He says this is how many of them deliver on their admission promises: they falsify students application materials.
A report by consulting firm Zinch China seems to confirm this. Zinch advises American colleges and universities on recruiting Chinese students. The firm interviewed agents and admissions consultants, as well as more than 200 Beijing students headed to U.S. schools. Zinch estimates 90 percent of these students submitted false recommendation letters; 70 percent had other people write their personal essays, and half of them submitted forged high school transcripts.Jiang Xueqin: There's a lot of pressure on the agencies to write the application essays, to fake transcripts, to fake recommendation letters. This is just general business practice in China to falsify a lot of documentation.
Werner Herzog, LA, and structural employment in hot jazz
"We [Herzog and his wife] have to move into the city with the most substance in the United States, cultural substance."This jibes with something I've noticed since moving to LA and falling in (through no fault of my own) with the hot jazz scene in town. There are some extraordinary musicians around here, the kind who develop international followings and get glowing notices in the New York Times.
"And that wasn't New York..."
"New York is more on the receiving end, it's more on the consuming end. ... Los Angeles, this is a place where things get done."
LA has a wealth of musical talent, but if those musicians want any wealth for themselves they have to head east. Because, though you might argue that the West Coast has the best musicians, the East Coast unquestionably has the best fans, at least when it comes to ponying up. In NYC these musician actually make good money; in LA you can often find them working for kind words and Pez.
If you're looking for creative energy, I'm with Herzog -- you can't do better than LA. If you're looking for a market for all that creativity, you might want to try the other coast.
Tuesday, November 8, 2011
But some of my best friends are administrators
For all their admirable traits, we have to acknowledge the world administrators live in: they are generally at least one step removed from the classroom and regular contact with students; their jobs are highly paid and highly political with badly aligned incentives and considerable temptations to abuse the system. Movement reformers like Jonathan Chait have convinced themselves that a major key (perhaps the key) to improving education is removing checks on administrators' power and upping rewards for manipulating the system. I'm just pointing out that some administrators need less power and fewer temptations.
I haven't taken a cheap shot at an administrator for a while
* think this is hyperbole? Listen to the episode.
Speaking of curriculum -- Armenian edition
Armenia’s public schools started mandatory chess classes for every second, third and fourth grader in the former Soviet republic this year. Twice a week, seven- to ten-year-old Armenians are getting a half hour of instruction in chess basics, with the goal of being able to play a competent game by the end of fourth grade.
One of those schools is Public School 81 where Grigor Martikian is drilling 20 second graders on how to move the bishop. He positions a bishop into the corner of a large model board in front of the class.
The students follow along on chess mats on their desks.
Edouard Aroustian and Seta Kevorkian are both seven and have learned a new checkmate move. When I ask them if they know about Armenia’s national chess team, they nod and smile.
That team was the pride of Armenia this past summer, when it won the World Chess Team Championship in Ningbo, China. Armenians treat chess champions like star athletes. Chess is one of the most popular games here and there are 32 grandmasters in a population of about 3 million.
If only I could talk them into trying octagonal games...
Monday, November 7, 2011
At least we aren't giving them antidepressants
Babies have been crying and spitting up since time immemorial. But these days many parents ask: Isn't there a drug for that?
"Parents come in often demanding medication," says Eric Hassall, a pediatric gastroenterologist at Sutter Pacific Medical Foundation in San Francisco.
Prescriptions for acid-suppressing medicines for infants have increased dramatically. Hassall says some parents have picked up on the idea that heavily advertised medicines for reflux in adults can help fussy babies who spit up a lot.
He documented a 16-fold increase in prescriptions of one proton pump inhibitor, or PPI, Prevacid, which comes in a child-friendly formulation. A Food and Drug Administration review also found an 11-fold increase in number of new prescriptions dispensed between 2002 and 2009.
These medicines aren't approved for infants with reflux, or GERD. Still, some doctors have been prescribing them off-label anyway. Doctors generally agree this practice is OK when babies really need the medicine, such as when they're spitting up so much that they're not gaining weight.