Michio Kaku on CERN's Challenge to Relativity

In this morning's WSJ:

Reputations may rise and fall. But in the end, this is a victory for science. No theory is carved in stone. Science is merciless when it comes to testing all theories over and over, at any time, in any place. Unlike religion or politics, science is ultimately decided by experiments, done repeatedly in every form. There are no sacred cows. In science, 100 authorities count for nothing. Experiment counts for everything.

A reminder: Ronald Reagan raised capital gains taxes

The Tax Reform Act of 1986 actually did two things that required the affluent to pay higher taxes: it raised the effective tax rate on long-term capital gains from 20 to 28 percent, and it eliminated the ability to write passive losses against ordinary income.  This meant that after 1986, Warren Buffett's taxes would have been at least as high as his secretary's.  

Read Taylor Branch's Atlantic Piece on the NCAA

Let me pull out two paragraphs from the powerful story:

Educators are in thrall to their athletic departments because of these television riches and because they respect the political furies that can burst from a locker room. “There’s fear,” Friday told me when I visited him on the University of North Carolina campus in Chapel Hill last fall. As we spoke, two giant construction cranes towered nearby over the university’s Kenan Stadium, working on the latest $77 million renovation. (The University of Michigan spent almost four times that much to expand its Big House.) Friday insisted that for the networks, paying huge sums to universities was a bargain. “We do every little thing for them,” he said. “We furnish the theater, the actors, the lights, the music, and the audience for a drama measured neatly in time slots. They bring the camera and turn it on.” Friday, a weathered idealist at 91, laments the control universities have ceded in pursuit of this money. If television wants to broadcast football from here on a Thursday night, he said, “we shut down the university at 3 o’clock to accommodate the crowds.” He longed for a campus identity more centered in an academic mission.

and

“Scholarship athletes are already paid,” declared the Knight Commission members, “in the most meaningful way possible: with a free education.” This evasion by prominent educators severed my last reluctant, emotional tie with imposed amateurism. I found it worse than self-serving. It echoes masters who once claimed that heavenly salvation would outweigh earthly injustice to slaves. In the era when our college sports first arose, colonial powers were turning the whole world upside down to define their own interests as all-inclusive and benevolent. Just so, the NCAA calls it heinous exploitation to pay college athletes a fair portion of what they earn.

I love college athletics (I am thrilled that I have gotten to attend three Rose Bowls in which Wisconsin played) and admire many college athletes.  I not only envy their athletic prowess, I am amazed at the varsity athlete who can manage a B average in a difficult major while playing a sport.

But the NCAA system gives these athletes a raw deal.  Among other things, the system makes it difficult for athletes in revenue generating sports to get a real college experience--practice and games can leave students too tired to focus on class (yes, I know some athletes have no interest in class to begin with, but in my experience they are a distinct minority).  If the "pay" is supposed to be an education, the least we as colleges and universities can do is make sure athletes get one.

Allowing underwater borrowers to refinance could improve investors' Sharpe Ratio

Consider borrowers with 6 percent 30-year mortgages that are 20 percent underwater.  Assume that the probability that any one borrower will default in any one month is .2 percent, and that the cost of default to the lender conditional on default is 50 percent.  Assume that at the end of five years, any remaining long balance is paid off).  A security containing such mortgages will have an IRR of 4.83 percent (I am happy to share the spreadsheet for the details.

Now let us convert the borrowers into people with 4 percent mortgages with 20 year terms.  The payment from such mortgages will be essentially the same as before, and the mortgage balance will be paid off more quickly.  The good news for investors is that this lowers the probability of default; the bad news is that it reduces the yield before default.  Assuming default probabilities in any one month go down to .1 percent, the IRR for investors goes down to 3.45 percent.  This seems like a bad deal for investors, except that they will have more certainty about their cash flows; the standard deviation of their investment falls.  Because default is binomial, we can calculate that the variance of returns will be p*(expected loss)*(1-p*expected loss).  The variance of not refinancing is thus .0099 and of refinancing is .004975, which translate into standard deviations of .1 and .07.  Because the riskless rate is currrently zero, when we substitute into the Sharpe formula, we find

Sharpe no refinance = .048/.1; Sharpe refinance = .0345/.07. 

This is about .5 in both cases, suggesting that investors are getting the same risk adjusted return whether refinancing becomes easy of not, assuming the assumptions are correct.  I am not saying they are; I am saying that in making policy we need to think about these sorts of implications.

Testimony to Senate Banking Committee on the Need for Mortgage Guarantees

I testified yesterday.

If the Walt Disney Company ran LA Metro...

People would pay $80 a day to leave their cars in a garage, and then walk from one mode of rail transit to another.  And the rail trips would leave you where you started.

Jim Follain has a proposal for empirical macro

He writes:

First, let’s do more research to help reduce the uncertainty regarding the fiscal situation we face and the new, modern and more complex economy in which we live. This step will involve de-emphasizing a number of metrics underlying macroeconomics built around national totals, such as national income, GDP and the aggregate unemployment rate. Instead, we are wise to take a more geographically granular view of our economy that measures regional, state and local economic activity and adapts policies specific to these areas. Focusing upon the national aggregate or the national average masks the extraordinary variation among markets in this country and, indeed, can even make it harder to identify seriously stressful events until it’s too late. This is difficult to do, but c’est la vie.