andrew_gelman_stats andrew_gelman_stats-2011 andrew_gelman_stats-2011-966 knowledge-graph by maker-knowledge-mining

966 andrew gelman stats-2011-10-20-A qualified but incomplete thanks to Gregg Easterbrook’s editor at Reuters


meta infos for this blog

Source: html

Introduction: Dear Reuters editor: Thanks for reading my blog and correcting the erroneous numbers in Easterbrook’s column from the other day. I’m pretty sure you got the corrections from my blog because in your corrections you used the exact same links that I posted. I think your readers will like that you gave links to the sources of your numbers. But I’d appreciate if you cite me! It’s considered polite to credit your sources rather than just copying over numbers and links with no mention of where they came from. Unlike Easterbrook, I’m not expecting to be paid for this material but I’d still like to be thanked. (See the last paragraph of this post by Felix Salmon for more on the desirability of linking to your sources.) Also, since you’re correcting the article anyway, maybe you could go back and change this sentence too: But don’t sell Huntsman short because he is low in the polls – Obama had been at that point, too. As I noted earlier, As of 14 Oct 2011, Gallup gi


Summary: the most important sentenses genereted by tfidf model

sentIndex sentText sentNum sentScore

1 Dear Reuters editor: Thanks for reading my blog and correcting the erroneous numbers in Easterbrook’s column from the other day. [sent-1, score-0.44]

2 I’m pretty sure you got the corrections from my blog because in your corrections you used the exact same links that I posted. [sent-2, score-0.636]

3 I think your readers will like that you gave links to the sources of your numbers. [sent-3, score-0.43]

4 It’s considered polite to credit your sources rather than just copying over numbers and links with no mention of where they came from. [sent-5, score-0.6]

5 Unlike Easterbrook, I’m not expecting to be paid for this material but I’d still like to be thanked. [sent-6, score-0.079]

6 (See the last paragraph of this post by Felix Salmon for more on the desirability of linking to your sources. [sent-7, score-0.186]

7 ) Also, since you’re correcting the article anyway, maybe you could go back and change this sentence too: But don’t sell Huntsman short because he is low in the polls – Obama had been at that point, too. [sent-8, score-0.176]

8 As I noted earlier, As of 14 Oct 2011, Gallup gives Huntsman 2% support among Republicans. [sent-9, score-0.091]

9 He was in second place with 21% support (compared to Hillary Clinton at 50%). [sent-15, score-0.091]

10 Finally, you might want to follow another one of the links on my blog post and explain to your readers that the idea that Obama might lose in 2012 is not new, that political scientist Doug Hibbs floated the idea (with supporting evidence) several months ago. [sent-17, score-0.561]

11 I know this is a lot of editing, but now that you’ve started, why not finish the job? [sent-18, score-0.092]

12 First, the mistakes appeared in Reuters, which I think of as a news organization that tries to get its facts right. [sent-23, score-0.077]

13 Second, electoral politics is one of my areas of research and it bugs me when people get things wrong. [sent-24, score-0.078]

14 I don’t want to start a side career pointing out that “something is wrong on the internet” (as xkcd put it), but now that I happened to notice this one, I’d like to follow it up. [sent-25, score-0.216]


similar blogs computed by tfidf model

tfidf for this blog:

wordName wordTfidf (topN-words)

[('huntsman', 0.328), ('links', 0.222), ('reuters', 0.199), ('rick', 0.184), ('easterbrook', 0.181), ('obama', 0.176), ('correcting', 0.176), ('corrections', 0.167), ('cain', 0.121), ('pal', 0.121), ('xkcd', 0.121), ('sources', 0.121), ('department', 0.114), ('newt', 0.114), ('michele', 0.114), ('desirability', 0.109), ('herman', 0.109), ('gingrich', 0.105), ('hillary', 0.102), ('perry', 0.102), ('erroneous', 0.1), ('santorum', 0.1), ('hibbs', 0.097), ('oct', 0.095), ('follow', 0.095), ('finish', 0.092), ('mitt', 0.092), ('support', 0.091), ('polite', 0.09), ('bothers', 0.089), ('doug', 0.088), ('readers', 0.087), ('editing', 0.087), ('numbers', 0.084), ('dear', 0.083), ('copying', 0.083), ('ron', 0.082), ('gallup', 0.082), ('felix', 0.081), ('salmon', 0.081), ('clinton', 0.081), ('blog', 0.08), ('romney', 0.079), ('expecting', 0.079), ('polling', 0.079), ('electoral', 0.078), ('october', 0.078), ('tries', 0.077), ('linking', 0.077), ('supporting', 0.077)]

similar blogs list:

simIndex simValue blogId blogTitle

same-blog 1 0.99999982 966 andrew gelman stats-2011-10-20-A qualified but incomplete thanks to Gregg Easterbrook’s editor at Reuters

Introduction: Dear Reuters editor: Thanks for reading my blog and correcting the erroneous numbers in Easterbrook’s column from the other day. I’m pretty sure you got the corrections from my blog because in your corrections you used the exact same links that I posted. I think your readers will like that you gave links to the sources of your numbers. But I’d appreciate if you cite me! It’s considered polite to credit your sources rather than just copying over numbers and links with no mention of where they came from. Unlike Easterbrook, I’m not expecting to be paid for this material but I’d still like to be thanked. (See the last paragraph of this post by Felix Salmon for more on the desirability of linking to your sources.) Also, since you’re correcting the article anyway, maybe you could go back and change this sentence too: But don’t sell Huntsman short because he is low in the polls – Obama had been at that point, too. As I noted earlier, As of 14 Oct 2011, Gallup gi

2 0.41128355 959 andrew gelman stats-2011-10-14-The most clueless political column ever—I think this Easterbrook dude has the journalistic equivalent of “tenure”

Introduction: I don’t know when I’ve seen political writing quote so misinformed as this. It’s a bizarre mixture of cliches, non-sequitors, and outright mistakes. The author is Gregg Easterbrook and he’s writing for Reuters . First, the cliches: Right now Romney seems to be the frontrunner, which, of course, is a mixed blessing. His aura of experience and reasonableness could prove quite appealing to voters. Perry continues to have the potential to light a populist fire. . . . Of all the 2012 candidates, Huntsman is the one who is Not Just Another Politician. And now the errors. At this point in the 1992 election cycle, the elder George Bush held an 89 percent approval rating. . . . Clinton beat a popular incumbent with a fantastic approval rating. For the 2012 election, Barack Obama is just as vulnerable as the elder Bush, if not even more so. Obama currently has an approval rating of 23 percent. This is all fine, except that: 1. It’s not true that at this point in the 1992 elec

3 0.24794574 1075 andrew gelman stats-2011-12-20-This guy has a regular column at Reuters

Introduction: Gregg Easterbrook : Gingrich is a wild card. He probably would end up a flaming wreckage in electoral terms, but there’s a chance he could become seen as the man unafraid to bring sweeping change to an ossified Washington, D.C. There’s perhaps a 90 percent likelihood Obama would wipe the floor with Gingrich, versus a 10 percent likelihood Gingrich would stage an historic upset. This is the dumbest thing I’ve seen since . . . ummm, I dunno, how bout this ? It actually gets worse because Easterbrook then invokes game theory. What next? Catastrophe theory? Intelligent design? P.S. Maybe I should explain for readers without an education in probability theory. Let’s suppose “wipe the floor” means that Obama gets 55%+ of the two-party vote, and let’s suppose that “an historic upset” means that Obama gets less than 50% of the vote. Now try to draw a forecast distribution that has 90% of its probability above 0.55 and 10% of it’s probability below 0.50. It’s a pretty weird-loo

4 0.15044716 1083 andrew gelman stats-2011-12-26-The quals and the quants

Introduction: After I recently criticized Gregg Easterbrook for assigning Obama an implausible 90+% chance of beating Mitt Romney, some commenters thought I was being too critical, that I should cut Easterbrook some slack because he just was speaking metaphorically. In other words, Easterbrook is a “qual.” He uses numbers in his writing because that’s what everyone is supposed to do nowadays, but he doesn’t intend those numbers to be meant literally. Similarly, he presumably didn’t really mean it when he wrote that Scott Brown and Elizabeth Warren “couldn’t be more different — personally or politically.” And he had no problem typing that Obama’s approval rating was 23% because, to him, “23%” is just another word for “low.” He’s a qual, that’s all. Similarly, when Samantha Power was just being a qual when she wrote the meaningful-sounding but actually empty statement, “Since 1968, with the single exception of the election of George W. Bush in 2000, Americans have chosen Republican pres

5 0.13579787 1574 andrew gelman stats-2012-11-12-How to Lie With Statistics example number 12,498,122

Introduction: This post is by Phil Price. Bill Kristol notes that “Four presidents in the last century have won more than 51 percent of the vote twice: Roosevelt, Eisenhower, Reagan and Obama”. I’m not sure why Kristol, a conservative, is promoting the idea that Obama has a mandate, but that’s up to him. I’m more interested in the remarkable bit of cherry-picking that led to this “only four presidents” statistic. There was one way in which Obama’s victory was large: he won the electoral college 332-206. That’s a thrashing. But if you want to claim that Obama has a “popular mandate” — which people seem to interpret as an overwhelming preference of The People such that the opposition is morally obligated to give way — you can’t make that argument based on the electoral college, you have to look at the popular vote. That presents you with a challenge for the 2012 election, since Obama’s 2.7-point margin in the popular vote was the 12th-smallest out of the 57 elections we’ve had. There’s a nice sor

6 0.13120237 967 andrew gelman stats-2011-10-20-Picking on Gregg Easterbrook

7 0.12770173 1569 andrew gelman stats-2012-11-08-30-30-40 Nation

8 0.11432814 2269 andrew gelman stats-2014-03-27-Beyond the Valley of the Trolls

9 0.1117103 2255 andrew gelman stats-2014-03-19-How Americans vote

10 0.10933772 394 andrew gelman stats-2010-11-05-2010: What happened?

11 0.10904424 1871 andrew gelman stats-2013-05-27-Annals of spam

12 0.105797 571 andrew gelman stats-2011-02-13-A departmental wiki page?

13 0.10280346 1830 andrew gelman stats-2013-04-29-Giving credit where due

14 0.097239569 84 andrew gelman stats-2010-06-14-Is it 1930?

15 0.09716133 220 andrew gelman stats-2010-08-20-Why I blog?

16 0.09503299 210 andrew gelman stats-2010-08-16-What I learned from those tough 538 commenters

17 0.094197929 1140 andrew gelman stats-2012-01-27-Educational monoculture

18 0.091578476 1832 andrew gelman stats-2013-04-29-The blogroll

19 0.090903148 551 andrew gelman stats-2011-02-02-Obama and Reagan, sitting in a tree, etc.

20 0.089971229 1562 andrew gelman stats-2012-11-05-Let’s try this: Instead of saying, “The probability is 75%,” say “There’s a 25% chance I’m wrong”


similar blogs computed by lsi model

lsi for this blog:

topicId topicWeight

[(0, 0.169), (1, -0.121), (2, 0.014), (3, 0.07), (4, -0.053), (5, 0.027), (6, 0.011), (7, -0.056), (8, -0.034), (9, -0.027), (10, 0.013), (11, 0.02), (12, 0.031), (13, -0.027), (14, -0.063), (15, 0.057), (16, -0.065), (17, -0.012), (18, -0.009), (19, 0.053), (20, 0.026), (21, 0.044), (22, 0.033), (23, 0.032), (24, -0.017), (25, -0.012), (26, -0.048), (27, -0.013), (28, -0.013), (29, -0.007), (30, 0.044), (31, 0.049), (32, -0.037), (33, 0.022), (34, -0.027), (35, 0.003), (36, -0.013), (37, -0.05), (38, 0.038), (39, -0.063), (40, 0.052), (41, -0.04), (42, 0.066), (43, 0.022), (44, -0.013), (45, 0.013), (46, 0.014), (47, 0.05), (48, -0.026), (49, -0.091)]

similar blogs list:

simIndex simValue blogId blogTitle

same-blog 1 0.94343841 966 andrew gelman stats-2011-10-20-A qualified but incomplete thanks to Gregg Easterbrook’s editor at Reuters

Introduction: Dear Reuters editor: Thanks for reading my blog and correcting the erroneous numbers in Easterbrook’s column from the other day. I’m pretty sure you got the corrections from my blog because in your corrections you used the exact same links that I posted. I think your readers will like that you gave links to the sources of your numbers. But I’d appreciate if you cite me! It’s considered polite to credit your sources rather than just copying over numbers and links with no mention of where they came from. Unlike Easterbrook, I’m not expecting to be paid for this material but I’d still like to be thanked. (See the last paragraph of this post by Felix Salmon for more on the desirability of linking to your sources.) Also, since you’re correcting the article anyway, maybe you could go back and change this sentence too: But don’t sell Huntsman short because he is low in the polls – Obama had been at that point, too. As I noted earlier, As of 14 Oct 2011, Gallup gi

2 0.90387404 959 andrew gelman stats-2011-10-14-The most clueless political column ever—I think this Easterbrook dude has the journalistic equivalent of “tenure”

Introduction: I don’t know when I’ve seen political writing quote so misinformed as this. It’s a bizarre mixture of cliches, non-sequitors, and outright mistakes. The author is Gregg Easterbrook and he’s writing for Reuters . First, the cliches: Right now Romney seems to be the frontrunner, which, of course, is a mixed blessing. His aura of experience and reasonableness could prove quite appealing to voters. Perry continues to have the potential to light a populist fire. . . . Of all the 2012 candidates, Huntsman is the one who is Not Just Another Politician. And now the errors. At this point in the 1992 election cycle, the elder George Bush held an 89 percent approval rating. . . . Clinton beat a popular incumbent with a fantastic approval rating. For the 2012 election, Barack Obama is just as vulnerable as the elder Bush, if not even more so. Obama currently has an approval rating of 23 percent. This is all fine, except that: 1. It’s not true that at this point in the 1992 elec

3 0.82895786 1075 andrew gelman stats-2011-12-20-This guy has a regular column at Reuters

Introduction: Gregg Easterbrook : Gingrich is a wild card. He probably would end up a flaming wreckage in electoral terms, but there’s a chance he could become seen as the man unafraid to bring sweeping change to an ossified Washington, D.C. There’s perhaps a 90 percent likelihood Obama would wipe the floor with Gingrich, versus a 10 percent likelihood Gingrich would stage an historic upset. This is the dumbest thing I’ve seen since . . . ummm, I dunno, how bout this ? It actually gets worse because Easterbrook then invokes game theory. What next? Catastrophe theory? Intelligent design? P.S. Maybe I should explain for readers without an education in probability theory. Let’s suppose “wipe the floor” means that Obama gets 55%+ of the two-party vote, and let’s suppose that “an historic upset” means that Obama gets less than 50% of the vote. Now try to draw a forecast distribution that has 90% of its probability above 0.55 and 10% of it’s probability below 0.50. It’s a pretty weird-loo

4 0.7999348 1083 andrew gelman stats-2011-12-26-The quals and the quants

Introduction: After I recently criticized Gregg Easterbrook for assigning Obama an implausible 90+% chance of beating Mitt Romney, some commenters thought I was being too critical, that I should cut Easterbrook some slack because he just was speaking metaphorically. In other words, Easterbrook is a “qual.” He uses numbers in his writing because that’s what everyone is supposed to do nowadays, but he doesn’t intend those numbers to be meant literally. Similarly, he presumably didn’t really mean it when he wrote that Scott Brown and Elizabeth Warren “couldn’t be more different — personally or politically.” And he had no problem typing that Obama’s approval rating was 23% because, to him, “23%” is just another word for “low.” He’s a qual, that’s all. Similarly, when Samantha Power was just being a qual when she wrote the meaningful-sounding but actually empty statement, “Since 1968, with the single exception of the election of George W. Bush in 2000, Americans have chosen Republican pres

5 0.75637895 1569 andrew gelman stats-2012-11-08-30-30-40 Nation

Introduction: Barack Obama’s win has a potentially huge effect on policy. The current budget negotiations will affect the level and direction of government spending and on the mix of taxes paid by different groups of Americans. We can guess that a President Romney would have fought hard against upper-income tax increases. Other areas of long-term impact include the government’s stance on global warming, foreign policy, and the likelihood that Obama will nominate new Supreme Court justices who will uphold the right to abortion announced in Roe v. Wade. When it comes to public opinion, the story is different. The Democrats may well benefit in 2014 and 2016 from the anticipated slow but steady recovery of the economy over the next few years—but, as of November 6, 2012, the parties are essentially tied, with Barack Obama receiving 51% of the two-party vote, compared to Mitt Romney’s 49%, a split comparable to Al Gore’s narrow victory in 2000, Richard Nixon’s in 1968, and John Kennedy’s in 1960.

6 0.75564748 1103 andrew gelman stats-2012-01-06-Unconvincing defense of the recent Russian elections, and a problem when an official organ of an academic society has low standards for publication

7 0.75075954 1574 andrew gelman stats-2012-11-12-How to Lie With Statistics example number 12,498,122

8 0.74552399 1830 andrew gelman stats-2013-04-29-Giving credit where due

9 0.72768521 885 andrew gelman stats-2011-09-01-Needed: A Billionaire Candidate for President Who Shares the Views of a Washington Post Columnist

10 0.72598976 967 andrew gelman stats-2011-10-20-Picking on Gregg Easterbrook

11 0.71864235 84 andrew gelman stats-2010-06-14-Is it 1930?

12 0.69759566 588 andrew gelman stats-2011-02-24-In case you were wondering, here’s the price of milk

13 0.69657671 1540 andrew gelman stats-2012-10-18-“Intrade to the 57th power”

14 0.69040483 521 andrew gelman stats-2011-01-17-“the Tea Party’s ire, directed at Democrats and Republicans alike”

15 0.68814355 1479 andrew gelman stats-2012-09-01-Mothers and Moms

16 0.68594164 1567 andrew gelman stats-2012-11-07-Election reports

17 0.68392432 656 andrew gelman stats-2011-04-11-Jonathan Chait and I agree about the importance of the fundamentals in determining presidential elections

18 0.68226558 551 andrew gelman stats-2011-02-02-Obama and Reagan, sitting in a tree, etc.

19 0.67046744 868 andrew gelman stats-2011-08-24-Blogs vs. real journalism

20 0.66115433 1556 andrew gelman stats-2012-11-01-Recently in the sister blogs: special pre-election edition!


similar blogs computed by lda model

lda for this blog:

topicId topicWeight

[(0, 0.023), (1, 0.019), (3, 0.016), (5, 0.016), (15, 0.033), (16, 0.091), (18, 0.015), (21, 0.03), (24, 0.102), (30, 0.022), (34, 0.024), (42, 0.035), (45, 0.033), (50, 0.017), (51, 0.079), (55, 0.02), (66, 0.01), (68, 0.011), (98, 0.072), (99, 0.223)]

similar blogs list:

simIndex simValue blogId blogTitle

same-blog 1 0.92929286 966 andrew gelman stats-2011-10-20-A qualified but incomplete thanks to Gregg Easterbrook’s editor at Reuters

Introduction: Dear Reuters editor: Thanks for reading my blog and correcting the erroneous numbers in Easterbrook’s column from the other day. I’m pretty sure you got the corrections from my blog because in your corrections you used the exact same links that I posted. I think your readers will like that you gave links to the sources of your numbers. But I’d appreciate if you cite me! It’s considered polite to credit your sources rather than just copying over numbers and links with no mention of where they came from. Unlike Easterbrook, I’m not expecting to be paid for this material but I’d still like to be thanked. (See the last paragraph of this post by Felix Salmon for more on the desirability of linking to your sources.) Also, since you’re correcting the article anyway, maybe you could go back and change this sentence too: But don’t sell Huntsman short because he is low in the polls – Obama had been at that point, too. As I noted earlier, As of 14 Oct 2011, Gallup gi

2 0.92783761 959 andrew gelman stats-2011-10-14-The most clueless political column ever—I think this Easterbrook dude has the journalistic equivalent of “tenure”

Introduction: I don’t know when I’ve seen political writing quote so misinformed as this. It’s a bizarre mixture of cliches, non-sequitors, and outright mistakes. The author is Gregg Easterbrook and he’s writing for Reuters . First, the cliches: Right now Romney seems to be the frontrunner, which, of course, is a mixed blessing. His aura of experience and reasonableness could prove quite appealing to voters. Perry continues to have the potential to light a populist fire. . . . Of all the 2012 candidates, Huntsman is the one who is Not Just Another Politician. And now the errors. At this point in the 1992 election cycle, the elder George Bush held an 89 percent approval rating. . . . Clinton beat a popular incumbent with a fantastic approval rating. For the 2012 election, Barack Obama is just as vulnerable as the elder Bush, if not even more so. Obama currently has an approval rating of 23 percent. This is all fine, except that: 1. It’s not true that at this point in the 1992 elec

3 0.9204706 1867 andrew gelman stats-2013-05-22-To Throw Away Data: Plagiarism as a Statistical Crime

Introduction: I’ve been blogging a lot lately about plagiarism (sorry, Bob!), and one thing that’s been bugging me is, why does it bother me so much. Part of the story is simple: much of my reputation comes from the words I write, so I bristle at any attempt to devalue words. I feel the same way about plagiarism that a rich person would feel about counterfeiting: Don’t debase my currency! But it’s more than that. After discussing this a bit with Thomas Basbøll, I realized that I’m bothered by the way that plagiarism interferes with the transmission of information: Much has been written on the ethics of plagiarism. One aspect that has received less notice is plagiarism’s role in corrupting our ability to learn from data: We propose that plagiarism is a statistical crime. It involves the hiding of important information regarding the source and context of the copied work in its original form. Such information can dramatically alter the statistical inferences made about the work. In statisti

4 0.91562271 1853 andrew gelman stats-2013-05-12-OpenData Latinoamerica

Introduction: Miguel Paz writes : Poderomedia Foundation and PinLatam are launching OpenDataLatinoamerica.org, a regional data repository to free data and use it on Hackathons and other activities by HacksHackers chapters and other organizations. We are doing this because the road to the future of news has been littered with lost datasets. A day or so after every hackathon and meeting where a group has come together to analyze, compare and understand a particular set of data, someone tries to remember where the successful files were stored. Too often, no one is certain. Therefore with Mariano Blejman we realized that we need a central repository where you can share the data that you have proved to be reliable: OpenData Latinoamerica, which we are leading as ICFJ Knight International Journalism Fellows. If you work in Latin America or Central America your organization can take part in OpenDataLatinoamerica.org. To apply, go to the website and answer a simple form agreeing to meet the standard

5 0.90641105 2234 andrew gelman stats-2014-03-05-Plagiarism, Arizona style

Introduction: Last month a history professor sent me a note regarding plagiarism at Arizona State University: Matthew Whitaker, who had received an expedited promotion to full professor and was made Director of a new Center for the Study of Race and Democracy by Provost Elizabeth Capaldi and President Michael Crow, was charged by most of the full professors in the History Faculty with having plagiarized throughout his corpus of work, copying from regular works of scholarship and from web sources. Indeed, in his response, which claimed that the petitioners were racist, Whitaker admitted to plagiarism in his work, defending himself in part by stating that he had not reviewed carefully the research and writing he had hired others to do. . . . What bothered my correspondent was that Whitaker remains an ASU Foundation Professor of History despite all the plaig. According to Whitaker’s webpage , he “is also a highly sought after speaker, having offered commentaries on NPR, PBS, . . . and other medi

6 0.9062506 1641 andrew gelman stats-2012-12-27-The Möbius strip, or, marketing that is impervious to criticism

7 0.9046036 2334 andrew gelman stats-2014-05-14-“The subtle funk of just a little poultry offal”

8 0.90363705 955 andrew gelman stats-2011-10-12-Why it doesn’t make sense to chew people out for not reading the help page

9 0.90339518 1594 andrew gelman stats-2012-11-28-My talk on statistical graphics at Mit this Thurs aft

10 0.90038794 196 andrew gelman stats-2010-08-10-The U.S. as welfare state

11 0.89794075 431 andrew gelman stats-2010-11-26-One fun thing about physicists . . .

12 0.8977266 2179 andrew gelman stats-2014-01-20-The AAA Tranche of Subprime Science

13 0.8973676 625 andrew gelman stats-2011-03-23-My last post on albedo, I promise

14 0.89719933 1 andrew gelman stats-2010-04-22-Political Belief Networks: Socio-cognitive Heterogeneity in American Public Opinion

15 0.89596105 1806 andrew gelman stats-2013-04-16-My talk in Chicago this Thurs 6:30pm

16 0.89372969 1300 andrew gelman stats-2012-05-05-Recently in the sister blog

17 0.8929863 376 andrew gelman stats-2010-10-28-My talk at American University

18 0.89244038 420 andrew gelman stats-2010-11-18-Prison terms for financial fraud?

19 0.89145172 666 andrew gelman stats-2011-04-18-American Beliefs about Economic Opportunity and Income Inequality

20 0.89112979 492 andrew gelman stats-2010-12-30-That puzzle-solving feeling