I know that Paul Krugman was not really serious when he linked this study naming him the most accurate prognosticator in America. Nonetheless, it's getting some play around the internet, and a warm reception from people who don't seem to know any better, so it's worth pointing out why this sort of thing is so dreadful. I mean, I'm sure it was a very fine senior project for the Hamilton College students who produced it, but the results tell us nothing at all about the state of prognostication in this country.
Krugman quotes this segment from the Hamilton College press release:
Now, a class at Hamilton College led by public policy professor P. Gary Wyckoff has analyzed the predictions of 26 prognosticators between September 2007 and December 2008. Their findings? Anyone can make as accurate a prediction as most of them if just by flipping a coin.
The students found that only nine of the prognosticators they studied could predict more accurately than a coin flip. Two were significantly less accurate, and the remaining 14 were not statistically any better or worse than a coin flip.
The top prognosticators - led by New York Times columnist Paul Krugman - scored above five points and were labeled "Good," while those scoring between zero and five were "Bad." Anyone scoring less than zero (which was possible because prognosticators lost points for inaccurate predictions) were put into "The Ugly" category. Syndicated columnist Cal Thomas came up short and scored the lowest of the 26.
I myself read Paul Krugman more often than Cal Thomas, so perhaps I should take this as evidence of my perspicacity . . . but no. This is nonsense. The study runs for a little over a year, between September 2007 and 2008. They didn't even look at all of the statements made by the prognosticators, but at a "representative sample", presumably because they couldn't handle the volume that would be required to analyze all of it. Some of the prognosticators made too few testable predictions to generate good results, and the riskiness of the prediction varied--someone who predicted that Obama was going to win the election in October 2008 seems to have gotten the same "score" for that flip as someone who predicted that Obama would do so in September 2007. The number of predictions varied between commentators, making comparison even more difficult.
Against this background, it makes no sense to say--as the students and the press release do--that this study shows that "a number of individuals in our sample, including Paul Krugman, Maureen Dowd, Ed Rendell, Chuck Schumer, Nancy Pelosi, and Kathleen Parker were better than a coin flip (sometimes, substantially so.)" One of the commonest fallacies you see among beginning students of probability is the belief that if a coin has a 50% chance of turning up heads, then anyone who flips a coin multiple times should end up getting half heads, and half tails.
This is not true--especially when you have a small number of "flips", as most of the prognosticators did. (It's not surprising that George Will, who made the greatest number of predictions, was statistically very close to zero.) Rather, if you get a bunch of people to flip coins a bunch of times, you'll get a distribution. Most of the results will cluster close to 50/50 (as was true in this case), but you'll get outliers.
This is often pointed out in the case of mutual fund managers, as John Bogle does using this graph:
And indeed, my finance profs taught me that the top mutual funds in a given year are not any more likely to show up as next year's top funds. Indeed, they may be less likely to do well the next year. Why? Because funds have strategies, which do better or worse depending on market conditions. The funds that do well in a given year are probably the funds that were especially well positioned to show outsized fluctuations in response to whatever changed that year--but that also means that they're especially likely to do lose money when those conditions change. Because the fluctuations are a random walk, they do not vindicate the fund manager's strategy or perspicacity--but they may seem to, temporarily.
Which may cast some light on why liberal pundits did especially well in this test. If you were the sort of person who is systematically biased towards predicting a bad end for Republicans, and a rosy future for Democrats, then election year 2008 was going to make you look like a genius. If you were the sort of person who takes a generally dim view of anything Democrats get up to, then your pessimism was probably going to hit more often than it missed.
It would be interesting to go back and look at the same group in the year running up to 2010. But even then, it would tell us very little. To do any sort of a true test, we'd have to get a bunch of these prognosticators to all make predictions about the same binary events, over a lengthy period of time, and then see how they fared over a multi-year period. I suspect that they'd end up looking a lot like mutual fund managers: little variation that could be distinguished from random variance.
Once you take into account their fees, mutual fund managers, as a group, underperform the market. And I suspect you'd see the same thing with pundits: as a group, they'd slightly underperform a random coin flip. People like Lindsay Graham cannot go on Meet the Press and say "Yup, we're going to lose on November 2nd" even when it is completely obvious that this is what will happen; they need to present an optimistic bias for their base. Over time, that optimistic bias about no-hope causes will cause a slight negative drag on the predictive power of their statements.
Does that undermine the credibility of pundits? I don't think that predictions are the fundamental purpose of punditry (though I do encourage people to make them as a way of raising the stakes on the truth claims they make, and in order to give us a benchmark against which to analyze our reasoning). Pundits offer predictions, yes, but more importantly, they offer you facts, context, and analysis. Their really important work is to help you make your own wrong predictions about the world.
He lives near San Francisco, makes more than $50,000 per year, and is voting for the billionaire to fight against political correctness.
For several days, I’ve been corresponding with a 22-year-old Donald Trump supporter. He is white, has a bachelor’s degree, and earns $50,000 to $60,000 per year.
He lives near San Francisco.
“I recently became engaged to my Asian fiancée who is making roughly 3 times what I make, and I am completely supportive of her and proud she is doing so well,” he wrote. “We’ve both benefitted a lot from globalization. We are young, urban, and have a happy future planned. We seem molded to be perfect young Hillary supporters,” he observed, “but we're not. In 2016, we're both going for Trump.”
At first, we discussed Bill Clinton.
Last week, I wrote an article asking why Trump supporters aren’t bothered that their candidate called Clinton a shameful abuser of women who may well be a rapist. After all, Trump used to insist that Clinton was a victim of unfair treatment during his sex scandals. Either Trump spent years defending a man that he believed to be a sexual predator, even welcoming him as a guest at his wedding, or Trump is now cynically exploiting a rape allegation that he believes to be false.
A 1979 book on presidential selection inadvertently predicted the rise of Trump—and the weakness of a popular primary system.
Predictions are dangerous business, especially in the hall of mirrors that American politics has become. Suffice it to say, no one called this U.S. presidential election cycle—not Trump, not Sanders, not any of it.
Except, perhaps, in a round-about way, a 1979 book about the presidential-primary system. James Ceaser, a University of Virginia professor, outlined the history and potential weaknesses of various nomination processes, including one that largely relies on popular primaries. Starting in the early 1970s, Democrats and Republicans began reforming their primary-election processes, transferring influence over nominations away from party leaders to voters. This kind of system is theoretically more democratic, but it also has weaknesses—some of which have been on display in 2016. When I spoke with a couple of conservative political-science professors about their field last month, one of them remarked, with just a hint of jealousy, “I expect Jim Ceaser to take a victory lap around the country saying I told you so.”
A conversation about how Game of Thrones’s latest twist fits in with George R.R. Martin’s typically cliché-busting portrayal of disability
In 2014, a few media outlets ran stories diagnosing Game of Thrones’s Hodor as having expressive aphasia, a neurological condition restricting speech. Some aphasia experts pushed back, saying that while Hodor has often been described as “simple-minded” or “slow of wits,” aphasia only affects linguistic communication—not intelligence.
Finally, an explanation for Bitchy Resting Face Nation
Here’s something that has always puzzled me, growing up in the U.S. as a child of Russian parents. Whenever I or my friends were having our photos taken, we were told to say “cheese” and smile. But if my parents also happened to be in the photo, they were stone-faced. So were my Russian relatives, in their vacation photos. My parents’ high-school graduation pictures show them frolicking about in bellbottoms with their young classmates, looking absolutely crestfallen.
It’s not just photos: Russian women do not have to worry about being instructed by random men to “smile.” It is Bitchy Resting Face Nation, seemingly forever responding “um, I guess?” to any question the universe might pose.
This does not mean we are all unhappy! Quite the opposite: The virile ruler, the vodka, the endless mounds of sour cream—they are pleasing to some. It’s just that grinning without cause is not a skill Russians possess or feel compelled to cultivate. There’s even a Russian proverb that translates, roughly, to “laughing for no reason is a sign of stupidity.”
A real-time chronicle of Donald Trump’s unpresidential statements.
People will look back on this era in our history, to see what was known about Donald Trump while Americans were deciding whether to choose him as president. Here’s a running chronicle from James Fallows on the ways in which Trump has been unpresidential in an unprecedented way. (If you’d like to flag examples to include, please let us know.)
In the 1990s, A.J. Benza learned first hand how the real-estate developer got his name––and his net worth––in all the New York City papers.
Earlier this month, I heard A.J. Benza, the host of the celebrity-scandal show “Case Closed with A.J. Benza,” tell the podcast host Adam Carolla about his younger days as a gossip reporter in New York City. He hung out with celebrities until the wee hours of the morning, reported out sensational rumors, and constantly traded favors in order to get juicy tidbits for columns at Newsday and the New York Daily News. Most trades involved information he wanted about a particular person at a particular moment––and he would then owe his source a favor in the future.
“Donald Trump was the biggest guy in the world with that,” he said. “Trump spent every morning on the phone with me, with Page 6––he loved to get his name in the paper. As a result, he would drop dimes on other people in every industry he knew dirt on. You put the story in the paper, and then, three days later, you say, ‘Donald Trump was at a Knicks game with this supermodel.’ And he’s happy. That’s all it took.”
Our peshmerga are the best fighting force against ISIS in Iraq. But we cannot force Sunni and Shia Arabs to live together in peace.
This week marked the start of offensives ultimately aimed at retaking two of ISIS’s last major urban strongholds—Raqqa, the group’s de facto capital in Syria, and Fallujah, the first major Iraqi city to fall to ISIS some two years ago. The final prize, Mosul, seems to remain out of reach for the foreseeable future, despite indications a year ago that a battle to retake the city could come any day. An Iraqi army offensive launched in late March stalled quickly.
Mosul is Iraq’s second-largest city. ISIS wrested it from Iraqi government control in 2014 in its first major show of strength, and it is where Islamic State leader Abu Bakr al-Baghdadi declared a “caliphate” and demanded the allegiance of the world’s Muslims. Taking it back will be essential to winning the war against ISIS. But as fighters opposed to ISIS try to advance elsewhere on the battlefield, little is being done to promote the reconciliation between Shia and Sunni Arabs that Iraq really needs—both to construct a force capable of beating ISIS, in Mosul and beyond, and to create the political conditions to prevent its return.
A rock structure, built deep underground, is one of the earliest hominin constructions ever found.
In February 1990, thanks to a 15-year-old boy named Bruno Kowalsczewski, footsteps echoed through the chambers of Bruniquel Cave for the first time in tens of thousands of years.
The cave sits in France’s scenic Aveyron Valley, but its entrance had long been sealed by an ancient rockslide. Kowalsczewski’s father had detected faint wisps of air emerging from the scree, and the boy spent three years clearing away the rubble. He eventually dug out a tight, thirty-meter-long passage that the thinnest members of the local caving club could squeeze through. They found themselves in a large, roomy corridor. There were animal bones and signs of bear activity, but nothing recent. The floor was pockmarked with pools of water. The walls were punctuated by stalactites (the ones that hang down) and stalagmites (the ones that stick up).
The presumptive Republican nominee harshly criticized the judge presiding over a Trump University lawsuit.
Gonzalo Curiel is a federal judge in southern California and a former federal prosecutor. He is also, according to Donald Trump, “a hater of Donald Trump.”
The presumptive Republican nominee for president devoted almost a quarter of his hour-long rally in San Diego on Friday night to criticizing Curiel, who is currently presiding over a class-action lawsuit against the real-estate businessman for his role in Trump University.
During his disjoined remarks at the rally, Trump invoked Curiel’s ethnicity, said the judge should recuse himself from the trial, called for an investigation into him, described him as “negative” and a “hater,” insisted on a summary dismissal of the case, complained about being “railroaded by a legal system,” and asserted he would win the trial.