Games

I’ve noticed in Hong Kong that exiters are not accorded absolute priority.  That is, those entering the elevator can push their way through before the leavers have left, without being considered impolite, unlike in the United States.  In part, Hong Kongers are in a hurry, but that does not itself explain the difference in customs.  After all, exiters are in a hurry too, so why take away their priority rights?  Perhaps we should look again to Coase.  If some people who wish to enter are in a truly big hurry, they can barge forward.  Furthermore, an exiter who is not in a hurry at all can hold back, knowing that someone will rush to fill the void, rather than ending up in the equilibrium of excessive politeness where each defers to the other and all movements are delayed.  That is not an equilibrium you see often in downtown Hong Kong.

There is another positive effect from the Hong Kong method.  If you will be exiting the elevator, you have to step forward early on and be ready to leave promptly, to avoid being swamped by the new entrants.  That means the process of exit takes place more quickly.  And so the entrants who are in a hurry actually do get on their way earlier than would otherwise have been the case.

#smallstepstowardamuchbetterworld

In my latest New York Times column for The Upshot, I look at some evidence on the gender gap.  Here is the bad news:

In one set of these experiments, called the dictator game, women were found to be more generous than men. Players were given $10 and allowed but not required to hand out some of it to a hidden and anonymous partner. Women, on average, gave away $1.61 of the $10, whereas men gave away only 82 cents.

In another test, called the ultimatum game, one player received $10 and then decided how much of it to offer to a partner. (Let’s say the first player suggests, “$8 for me, $2 for you.” If the respondent accepts the offer, that’s what each gets. If the respondent is offended by the unequal division or dislikes it for any other reason, he or she may refuse, and then no one gets anything.)

The depressing news was this: Both men and women made lower offers, on average, when the responder was female. Male proposers offered an average of $4.73 to male respondents, but only $4.43 to women. More painful yet was the behavior of female proposers, who, on average, offered $5.13 to men but only $4.31 to women. It seems that women were seen as softies who were willing to settle for less — and the discrimination was worse coming from the women themselves.

I am nonetheless optimistic about longer-term trends, and here is one specific example I give:

As a former chess player, I am struck by the growing achievements of women in this great game — one in which men were once said to have an overwhelming intrinsic advantage. (Among the unproven contentions was that men were better at pattern recognition.) Although women were never barred from touching the chess pieces, strong female players were few in number.

These days, many more women play very well, and the gap between the top men and women in the game is narrowing. The main driver of the change appears to be that more and more women are playing chess, creating a cycle of positive reinforcement that encourages ever more women to excel. We’ve seen a similar dynamic in the workplace, as more women have made great strides in the areas of law, medicine and academia. And this process may spread to other sectors of the economy as well, such as technology industries.

Do read the whole thing.

Is hypergamy fading?

by on September 12, 2014 at 2:20 am in Education, Games | Permalink

Here is a new paper from Christine R. Schwartz and Hongyun Han, and here is the key part of the abstract:

…marriages in which wives have the educational advantage were once more likely to dissolve, but this association has disappeared in more recent marriage cohorts. Another key finding is that the relative stability of marriages between educational equals has increased. These results are consistent with a shift away from rigid gender specialization toward more flexible, egalitarian partnerships, and they provide an important counterpoint to claims that progress toward gender equality in heterosexual relationships has stalled.

There are ungated versions here, and for the pointer I thank the excellent Kevin Lewis.

Thirteen percent of US citizens play the lottery every week. The average household spends around $540 annually on lotteries and poor households spend considerably more than the average. The high demand for lotteries, especially among the poor, has led many to suggest that we use them to promote some other good. Los Angeles, for example, has recently discussed giving voters lottery tickets–a great idea if we want to encourage more voting by uninformed people with a penchant for get-rich-quick schemes. What could go wrong?

A somewhat better idea is to use lotteries to promote saving. Prize linked savings (PLS) accounts offer savers pro-rata lottery tickets based on how much they save. The average return on a PLS account can be the same as on regular account but the interest rate is lowered to make up for the small probability of a big gain. It’s illegal for banks in the United States to offer lotteries but a few credit unions have experimented with PLS accounts and they are used in some 20 other countries around the world.

Does the option of saving in a PLS account increase total savings or does it merely reallocate savings? In a new paper, Atalay, Bakhtiar, Cheung and Slomin run an experiment in which participants allocate a budget to consumption, saving, lottery tickets, and a PLS account. They conclude:

…the introduction of a PLS account indeed increases total savings quite dramatically (on average by 12 percentage points), and that the demand for the PLS account comes from reductions in lottery expenditures and current consumption. We further show that these results are stronger among study participants with the lowest reported savings on the survey.

Thus, PLS accounts appear to be a kind of crafty nudge, a way to trick the get-rich-quick brain module to save more.

If we allow PLS accounts, the poor may save more and in a competitive bank market the return on PLS accounts will trump the lousy returns offered by state lotteries. Win, win. If we deregulate all kinds of lotteries, however, I have little doubt that entrepreneurs will come up with schemes that will easily trump PLS accounts–but without the social benefit of encouraging saving among the poor. As a libertarian, I can live with that but as a political economist I wonder how well we can draw the line between banning gambling and allowing gambling so long as it’s tied to a nice nudge.

How to look smart?

by on August 15, 2014 at 1:27 pm in Games, Philosophy | Permalink

Perhaps these results are speculative all around, but I am happy to report them for your consideration:

Another strategy identified by the survey, wearing glasses, appears to be surprisingly effective. Figures released in 2011 by the College of Optometrists, in the U.K., show that 43 percent of the people it surveyed believe glasses make a person look more intelligent.

But you may not need glasses if you’re beautiful. A Czech study found that certain facial features—narrow faces, long noses, and thin chins—correlated with both perceived intelligence and attractiveness. Interestingly, men who were considered smart-looking actually tended to have higher IQs; the same was not true for women.

Other ways to signal intelligence without opening your mouth include walking at the same pace as those around you. Subjects in one study rated a person moving faster or slower than “normal human walking speed” as less competent and intelligent. Speaking of incompetence: don’t drink in public, at least not at work functions. The perceived association between alcohol and stupid behavior is so strong, according to a 2013 study, that merely holding a beer makes you appear dumber.

How you write matters, too—particularly how you write your name. Middle initials apparently lend a person a certain cachet. Participants in a study published this year rated writing samples more favorably when the author’s name included a middle initial; they also presumed people with middle initials to be of higher social status than their uninitialed peers. Typing your initial in the Comic Sans font, though, could ruin the whole thing: a Princeton researcher found that a hard-to-read font made an author seem dumber, while a clean, simple typeface (Times New Roman, in the study) made him or her seem more intelligent.

The same researcher also looked at how using big words (a classic strategy for impressing others) affects perceived intelligence. Counterintuitively, grandiose vocabulary diminished participants’ impressions of authors’ cerebral capacity. Put another way: simpler writing seems smarter.

The full link is here, with footnotes and sourcing, hat tip goes to Catherine Rampell.

David Brooks writes:

But when the Muslim Brotherhood government fell, the military leaders cracked down. They sentenced hundreds of the Brotherhood’s leadership class to death. They also closed roughly 95 percent of the tunnels that connected Egypt to Gaza, where the Brotherhood’s offshoot, Hamas, had gained power.

As intended, the Egyptian move was economically devastating to Hamas. Hamas derived 40 percent of its tax revenue from tariffs on goods that flowed through those tunnels. One economist estimated the economic losses at $460 million a year, nearly a fifth of the Gazan G.D.P.

Hamas needed to end that blockade, but it couldn’t strike Egypt, so it struck Israel. If Hamas could emerge as the heroic fighter in a death match against the Jewish state, if Arab TV screens were filled with dead Palestinian civilians, then public outrage would force Egypt to lift the blockade. Civilian casualties were part of the point. When Mousa Abu Marzook, the deputy chief of the Hamas political bureau, dismissed a plea for a cease-fire, he asked a rhetorical question, “What are 200 martyrs compared with lifting the siege?”

The eminent Israeli journalist Avi Issacharoff summarized the strategy in The Times of Israel, “Make no mistake, Hamas remains committed to the destruction of Israel. But Hamas is firing rockets at Tel Aviv and sending terrorists through tunnels into southern Israel while aiming, in essence, at Cairo.”

The full column is here.

These were the results:

1. People responded to first messages 44% more often.

2. “conversations went deeper”

3. Contact details were exchanged more quickly.

Furthermore:

When the photos were restored at 4PM, 2,200 people were in the middle of conversations that had started “blind”. Those conversations melted away.

That said, the people who actually used the “Blind Date App” if anything seemed slightly happier with their dates.  The full report from OKCupid is here.  Yet here is the combined chart drawn from when people score “looks” and “personality” separately.

By the way, I would never try to match you up with a book I fear you may not like, at least not without telling you or otherwise signaling that incompatibility in advance.

Israel’s major problem is that circumstances always change. Predicting the military capabilities of the Arab and Islamic worlds in 50 years is difficult. Most likely, they will not be weaker than they are today, and a strong argument can be made that at least several of their constituents will be stronger. If in 50 years some or all assume a hostile posture against Israel, Israel will be in trouble.

Time is not on Israel’s side. At some point, something will likely happen to weaken its position, while it is unlikely that anything will happen to strengthen its position. That normally would be an argument for entering negotiations, but the Palestinians will not negotiate a deal that would leave them weak and divided, and any deal that Israel could live with would do just that.

What we are seeing in Gaza is merely housekeeping, that is, each side trying to maintain its position. The Palestinians need to maintain solidarity for the long haul. The Israelis need to hold their strategic superiority as long as they can. But nothing lasts forever, and over time, the relative strength of Israel will decline. Meanwhile, the relative strength of the Palestinians may increase, though this isn’t certain.

Looking at the relative risks, making a high-risk deal with the Palestinians would seem prudent in the long run. But nations do not make decisions on such abstract calculations. Israel will bet on its ability to stay strong. From a political standpoint, it has no choice. The Palestinians will bet on the long game. They have no choice. And in the meantime, blood will periodically flow.

There is more here, of interest throughout, via Eric Reguly.

Here is one way to boost the employment to population ratio, two birds with one stone you might say:

Feng’s 23 year-old son, “Xiao Feng” (小冯) started playing video games in high school. Through his years of playing various online games, he supposedly thought himself a master of Chinese online role playing games. According to his father, Xiao Feng had good grades in school, so they allowed him to play games; but when he couldn’t land a job they started looking into things. He, however, says he simply couldn’t find any work that he liked. Feng was annoyed that his son couldn’t even tough it out for three months at a software development company.

Unhappy with his son not finding a job, Feng decided to hire players in his son’s favorite online games to hunt down Xiao Feng. It is unknown where or how Feng found the in-game assassins—every one of the players he hired were stronger and higher leveled than Xiao Feng. Feng’s idea was that his son would get bored of playing games if he was killed every time he logged on, and that he would start putting more effort into getting a job.

The full story is here, and for the pointer I thank Michael Smiddy.

In most Darwinian models there is competition across siblings for resources and parental attention, from the womb but also stretching into adulthood.  Siblings who do well therefore will be hyper-aware of the strategies employed by their brothers and sisters.  They will need to counter those strategies on a very regular basis and furthermore they will on average be deploying similar strategies themselves.

At the same time, siblings probably won’t see each other as so evil by nature.  They will be realistic about motives — some would say cynical — while at the same time recognizing that the siblings are probably, on average, no worse than themselves.  Plus there is a natural genetic and also family affinity.

How about mothers?  Genetically speaking, mothers often adopt the interests of the sibling as “their own.”  For instance a lot of mothers died in childbirth before modern medicine, when alternative biological arrangements would have given the mothers greater protection.  So the children can commandeer the loyalty of the mother (and sometimes the father) more readily than they can commandeer the loyalties of their siblings.

Mothers are therefore often deceived about or simply tolerant of the manipulations employed by their children on them.  In other words, mothers worry less about moral hazard problems with respect to their children.  The siblings will in some respects understand these strategies better than the mother will.

The other children may feel that a mother should punish (or possibly but less likely reward) the other siblings more.  And “Johnny is being a stinker” will be a more frequent complaint than “Johnny is possessed with Original Sin.”

In turn, mothers may worry more about problems of type.  If a mother is hyper-aware of the faults of her children, she may do a better job of protecting them or teaching them how to overcome those limitations.

A world where fewer people have siblings may be a world where recognizing moral hazard problems may be for many people less intuitive.  Is it also possible that men may on average be more aware of moral hazard problems than are women?  And women more aware of problems of type?

…on July 13, about four days before the actual incursion began, about 67 percent of Israelis supported a ground operation. By authorizing one, Netanyahu has given the public what it has demanded.

That is from Brent Sasley.

Fred Kaplan wonders whether Israel has lost its ability to think strategically.  Even Max Boot seems to think Hamas will stay in charge of Gaza.

Or is the fear that even intercepted Hamas rockets will in the long run spur too much Israeli emigration?  Are the economics of long-run rocket/shoot-down reciprocity unacceptable to Israel?

A friend of mine suggests that Israel feels the need to send a tough signal to Iran.

Or all of the above?

I am by the way not impressed by various Twitter demands that I should spend more time moralizing about this conflict.  I do think it is deontologically wrong on the part of the Israelis, and I also do not understand their strategy from even a purely nationalistic point of view.  But my voice will have no influence, and I would rather learn something from the comments section about why such strategies are being pursued.  Call me selfish if you wish, I am.

Sentences to ponder

by on July 10, 2014 at 10:54 am in Games, Medicine | Permalink

Countless times, I have found that it is only during the physical exam that patients reveal what is truly on their mind. Whether it is the cough that they are reminded of now that I am listening to their lungs, or whether it is the domestic violence, the eating disorder or the genital symptoms that they feel comfortable revealing once we are in a more intimate setting — there is something about touch that changes the dynamic.

That is from Danielle Ofri’s interesting piece on the physical exam in medicine, via Jeffrey Flier.

I would be surprised if there wasn’t:

Mr. Pilley told me, “The big lesson is to recognize that dogs are smarter than we think, and given time, patience and enough enjoyable reinforcement, we can teach them just about anything.”

It’s true that dogs everywhere are doing things that would have been unimaginable in the Alpo era. Last year, researchers at the University of Pennsylvania’s Working Dog Center trained a team of shepherds and retrievers to sniff out lab samples containing ovarian cancer. Scent hounds are also being used to forecast epileptic seizures and potentially life-threatening infections. A black Labrador from the St. Sugar Cancer-Sniffing Dog Training Center in Chiba, Japan, was accurate 98 percent of the time in picking up early-stage signs of colon cancer. As Mr. Hare, from Duke, said, “I will take a dog smelling my breath over a colonoscopy any day of the week, even if it’s just an experiment.”

From David Hochman, there is more here.

Michael Ben-Gad, a professor at London’s City University who has studied the credibility of long-term promises by governments, questions whether Nato’s commitment to collective defence is absolute and asks what would happen if Russia’s border guards crossed the bridge that separates Narva from Ivangorod and took the Estonian town.

“Would the US and western Europe really go to war to defend the territorial integrity of Estonia? I think Estonia has reasons to worry. Narva is the most obvious place; it is almost completely Russian-speaking,” he says.

More than 82 per cent of Narva’s residents are ethnic Russians and 4 per cent are ethnic Estonians. More than a third have Russian citizenship.

Here is the FT article, here are photos of Narva.  Here is a map of Narva:

Narva_in_Estonia

David Ball, a professor of risk management at Middlesex University, analyzed U.K. injury statistics and found that as in the U.S., there was no clear trend over time. “The advent of all these special surfaces for playgrounds has contributed very little, if anything at all, to the safety of children,” he told me. Ball has found some evidence that long-bone injuries, which are far more common than head injuries, are actually increasing. The best theory for that is “risk compensation”—kids don’t worry as much about falling on rubber, so they’re not as careful, and end up hurting themselves more often.

From The Overprotected Kid by Hanna Rosin in the Atlantic.

Addendum: More on the Peltzman Effect.