May 2008 Archives

Spectacular

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The possibility of a new G.I. Bill was interesting enough before Bush and McCain voiced their opposition to it.  Their reasoning?: It would incentivize leaving the military.  But wait, wouldn't it also incentivize joining the military too?  More disturbingly, the logical conclusion of this argument is that Bush and McCain essentially want the US to maintain an uneducated "underclass" of citizens who are willing do the nation's dirty work, only because they lack the education and skills to switch fields.  Bush and McCain seem to believe that we shouldn't let them advance too far, because otherwise they might realize that being and educated civilian tends to be an easier and more pleasant life than the military.  The military should not be designed as a socioeconomic trap, but a means of socioeconomic mobility.  It nothing else, members of the military deserve it given the incredible risk to which they voluntarily subject themselves.

Beauty

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I was plodding through some notes on relativity and electrodynamics and flipping through Jackson's tome on the subject when I had a flashback of Riemannian geometry and everything began to make sense.  If I have interpreted everything correctly (i.e. I could be dead wrong), these silly Lorentz transformations are just a Lie group (some subgroup of SO(4), I think).  Because they act on vectors in Minkowski space--a manifold!--the group of Lorentz transformations are, in fact, a Lie group action on Minkowski space, under which the Minkowski metric is (bi-?)invariant.  Hence the entire edifice of special relativity is reduced to one particular Lie group action on a rather boring Riemannian 4-manifold.  While I know absolutely no general relativity, this conception of the special case meshes well with the fact that (as I have heard) general relativity can be realized entirely in terms of Riemannian geometry.

The Human Microbiome

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This is really interesting:


Scav Hunt

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The University of Chicago Scavenger Hunt, the world's largest such event, has entered another glorious year.  Peruse the list here as students frantically hurry to complete items before The Judgement on Sunday.

Krugman

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I'll discuss this more later when I don't have two problem sets and paper to finish up in the next 9 hours, but I have to say that Paul Krugman needs to go back to economics.  It's almost inconceivable that this brilliant economist (he'll probably win a Nobel prize some day) could waste so much time producing so many utterly inane partisan rants in his New York Times columns.  Nearly all of his articles in the past year could be summarized in the words: Hillary good, Obama bad, McCain worse.  There is absolutely no nuance or objectivity to any of his arguments.  He essentially picks recent events that embarrass or extoll the particular candidate, then he applies different standards in his assessment of the candidates so that he ends up with the same old conclusion: Hillary good, Obama bad, McCain worse.

Here's a classic example from his most recent post:

During Barack Obama’s Sunday appearance on Fox News, the interviewer asked him for an example of “a hot-button issue where you would be willing to buck the Democratic Party line” and say that Republicans have the better idea.

Mr. Obama’s answer was puzzling because he gave credit where it isn’t due — and thereby undermined what could be a very effective Democratic line of argument.

In particular, Mr. Obama attributed to Republicans the idea that regulation can be flexible rather than a matter of “top-down command and control,” and in particular for the idea of controlling pollution with a system of tradable emission permits rather than rigid regulations.

Well, that’s not at all what actually happened — and the tale of what really did happen has a lot of relevance to current events.

It’s true that the first President Bush established a market-based system for controlling sulfur dioxide emissions, which has been highly successful at controlling acid rain. But by then the idea of markets in emission permits had long been accepted by economists of all political stripes.

And it had also been accepted by leading Democrats. The Environmental Protection Agency began letting cities meet air-quality standards using emissions-trading systems during the Carter administration — which also led the way on deregulation of airlines and trucking.

Furthermore, the sulfur dioxide scheme actually marked a sharp change in policy from the Reagan administration, which — committed to the belief that government is always the problem, never the solution — spent eight years opposing any effort to control acid rain."

Krugman makes the brilliantly stupid point that, surprise!  Democrats have at times supported, and sometimes do support market-based mechanisms for environmental control.  Probably everyone has at some point in their lives.  But the simple fact is, that Democrats have historically, on average, tended to support command and control regulations over incentive-based.  Although Republicans have been reluctant to enact environmental regulation, they simply are more likely to use incentive-based systems.  But even if this were false, it still wouldn't matter.  It wouldn't matter because the public perception is very definitely that Democrats tend to support more regulatory environmental controls, while Republicans support incentive-based schemes if they support environmental regulation at all.  To this extent, Obama's statement is still a meaningful departure from the Democratic stance.  In a democratic system where the public is God, public perceptions are all that matter.

Krugman needs to go rediscover logic, because apparently he forgot about it.  Or perhaps it is the allure of being on Hillary Clinton's Council of Economic Advisors that has gone to his head.  Or maybe the fear of the Chicago school that Obama would undoubtedly appoint.