Category: Education

How should economic instruction change?

I'll transplant the links in from Mark Thoma:

Here's my response, along with responses by Alberto Alesina, Laurence Kotlikoff, Michael Pettis, Gilles Saint-Paul, Paul Seabright, Richard Baldwin, Michael Bordo, Guillermo Calvo, Tyler Cowen, Harold James, David Laibson, and Eswar Prasad [All Responses].

I realized I forgot to talk about the need for more economic history, but that is discussed by several others so at least the point got made.

Serial hyperspecializers, and how they think

The highly-regarded-but-still undervalued Elijah Millgram has a paper on this topic, and he seems to be preparing a book.  Here is one good short bit:

So one reasonable strategy for a hyperspecializer will be to divide its energies between activities that don't share standards and methods of assessment, and let's abbreviate that to the fuzzier, problematic, but more familiar word, "values." It will be a normal side effect of pursuing the parallel hyperspecialization strategy that its values are incommensurable. The hedonic signals that guide reallocation of resources between niches do not require that niche-bound desires or goals or standards be comparable across niches. If you are a serial (and so, often a parallel) hyperspecializer, incommensurability in your values turns out not to be a mark of practical irrationality, or even an obstacle to full practical rationality, but rather, the way your evaluative world will look to you, when you are doing your practical deliberation normally and successfully. Evaluative incommensurability is a threat to the sort of rationality suitable for Piltdown Man. Serial hyperspecializers gravitate towards and come equipped for incommensurability.

Here is a good review of Millgram's latest book, which argues, among other things, that truth is messy in nature.

Adam Phillips serves up a Bob Dylan quotation: "I have always admired people who have left behind them an incomprehensible mess."

Zero price markets in everything, religious search engines

Shea Houdmann runs SeekFind, a Colorado Springs-based Christian search engine that only returns results from websites that are consistent with the Bible. He says SeekFind is designed "to promote what we believe to be biblical truth" and excludes sites that don't meet that standard.

Houdmann says a search on his site would not turn up pornography. If you search “gay marriage,” you would get results that argue against gay marriage. And if you type in “Democratic Party,” your first search result is a site on Marxism.

But SeekFind isn’t the only search engine carving a niche market among religious Internet users. There is also Jewogle for Jews and I'mHalal, a Muslim search engine that started in the Netherlands.

The Muslim site is already getting ten million users (or is that site visits?) a month.  The full story is here and for the pointer I thank Anastasia.

Addendum: I couldn't get the Christian search engine to work at all; the site blames heavy traffic [I tried again; googling my name gets you to Tyler Perry.  If you google "economics", "Islamic economics" pops up before "Christian economics" and "postmodern economics" comes before both].  The Halal site brought up more or less normal results both for my name and for "economics," although page one for the latter had some squirrely (non-Muslim) results, such as Hunter College.  I don't appear in Jewogle at all, but an economics query will bring you to a list of Nobel Laureates.

Which public figures have integrity?

UWC pleads:

I'm having a hard time coming up with many independently and oddly Google is failing to find a list.

Nelson Mandela
Garry Kasparov
Oprah Winfrey
Ellen DeGeneres
David Letterman
Simon Cowell

Help!

How did David Letterman get on that list?  Does Simon Cowell make the cut?  Is it about who has integrity or who is perceived as having integrity?

It also depends who you count as a public figure and whether they still must be living or only recently deceased.  For a few, how about Margaret Thatcher, Hans Blix, Anna Politkovskaya, Ben Goldacre, Lech Walesa, Christopher Reeve, Neil Armstrong, the passengers who downed the flight hijacked by al-Qaeda, leading members of the Iranian opposition, and any number of political dissidents, starting with Burma and Aung San Suu Kyi.  Lee Kuan Yew is a more controversial option; he has been a non-corrupt leader who led his country to a very good place, and more or less eliminated corruption, but he has not always respected civil liberties.  Nonetheless integrity is not the only value and I don't wish to use the word as a stand-in for all other values of import.

Who am I forgetting?  What would Robin Hanson say about this list?

Which requests do I not respond to?

BM has a request:

TC,

would you take a hand few requests (maybe 10 or so) from the comments here and tell us (in a word:'NO' or a short sentence why) you will NOT fill them?

I hope this request is excluded from your picks!

I won't handle those I have already written about and have no new insight on, those I will soon write about (I prefer for most of my non-blog writing to be relatively fresh), and those I have nothing to say about at all, usually because of my own lack of knowledge.  On top of that big pile, a small number of requests — small in percentage terms at least — strike me as best addressed by a quizzical, offbeat non-response.

I answer all the rest.

The preference for low quality in Italian academia

There is a relatively new paper by Diego Gambetta and Gloria Origgi, here is the abstract:

We investigate a phenomenon which we have experienced as common when dealing with an assortment of Italian public and private institutions: people promise to exchange high quality goods and services (H), but then something goes wrong and the quality delivered is lower than promised (L). While this is perceived as ‘cheating’ by outsiders, insiders seem not only to adapt but to rely on this outcome. They do not resent low quality exchanges, in fact they seem to resent high quality ones, and are inclined to ostracise and avoid dealing with agents who deliver high quality. This equilibrium violates the standard preference ranking associated to the prisoner’s dilemma and similar games, whereby self-interested rational agents prefer to dish out low quality in exchange for high quality. While equally ‘lazy’, agents in our L-worlds are nonetheless oddly ‘pro-social’: to the advantage of maximizing their raw self-interest, they prefer to receive low quality provided that they too can in exchange deliver low quality without embarrassment. They develop a set of oblique social norms to sustain their preferred equilibrium when threatened by intrusions of high quality. We argue that cooperation is not always for the better: high quality collective outcomes are not only endangered by self-interested individual defectors, but by ‘cartels’ of mutually satisfied mediocrities.

It is common practice, for instance, that high quality providers are not trusted because they are not signaling the appropriate kind of loyalty.  Might this model also apply outside of Italian academia?

Hat tip goes to Seth Roberts.

My debate with Bryan Caplan on education

Bryan writes:

The other day, Tyler Cowen challenged me to name any country that I consider under-educated.  None came to mind.  While there may be a country on earth where government doesn't on net subsidize education, I don't know of any.

…This analysis holds in the Third World as well as the First.  The fact that Nigerians and Bolivians don't spend more of their hard-earned money on education is a solid free-market reason to conclude that additional education would be a waste of their money.

I would first note that many parts of many poor countries, today, receive de facto zero government subsidies for education.  Or put aside the issue of government provision and ask if you were a missionary and could inculcate a few norms what would they be?  Many regions – in particular Latin America — are undereducated for their levels of per capita income.  I view this as a serious cultural failing, most of all in terms of its collective social impact.  In contrast, Kerala, India is very intensely educated for its income level and that brings some well-known benefits in terms of social indicators and quality of life.

If I think of the Mexican village where I have done field work, the education sector "works" as follows.  No one in the village is capable of teaching writing, reading, and arithmetic.  A paid outsider is supposed to man the school, but very often that person never appears, even though he continues to be paid.  Children do have enough leisure time to take in schooling, when it is available.  I am told that most of the teachers are bad, when they do appear.  You can get your children (somewhat) educated by leaving the village altogether, and of course some people do this.  In the last ten years, satellite television suddenly has become the major educator in the village, helping the villagers learn Spanish (Nahuatl is the indigenous language), history, world affairs, some science from nature shows, and telenovela customs.  The villagers seem eager to learn, now that it is possible.

That scenario is only one data point but it is very different than the "demonstrated preference" model which Bryan is suggesting.  Bolivia and Nigeria are much poorer countries yet and they have dysfunctional educational sectors as well, especially in rural areas.  Bad roads are a major problem for "school choice" in these regions, just as they are a major problem for the importation of teachers. 

A simple model is that underinvestment in infrastructure results in a high shadow value for marginal increments of education.  Model = high fixed costs, liquidity constraints if you wish, high shadow values for lots of goods and services, toss in social externalities to raise the size of the distortion.  I read Bryan as focusing on "the fixity of the fixed costs" and claiming it is too costly to get the service through, relative to return. 

Of course Bryan favors rising wealth and falling fixed costs, as do I.  But in the meantime he also should admit that a) education "parachuted" in from outside can have a high marginal return, b) collectively stronger pro-education norms raise demand and can alleviate the high fixed costs problem, c) there are big external benefits, some operating through the education channel, to lowering the fixed costs, d) stronger pro-education norms put a region closer to a "big breakthrough" and weaker education norms do the opposite, and e) a-d still impliy "too little education" is the correct judgment.  On b), some evangelical groups in Latin America do seem to have stronger pro-education norms in their converts and it appears to be much better for the children of these families and no I'm not going to buy any response which ascribes the whole effect to selection.

I believe that Bryan's own work on voting suggests significant positive social external benefits from education, although he is not happy with how I characterize his view here.  I also believe his views on children suggest strong peer effects across children (parental effort doesn't matter so much in his model and the rest of the influence has to come from somewhere), though in conversation I am again not sure he accepts this characterization.

I consider most countries in today's world to be undereducated. 

Signaling models are important but they are not the only effect and of course a lot of signaling is welfare-improving for reasons of screening and sorting and character reenforcement.  The traditional story of high social returns to education is supported by evidence from a wide variety of different fields and methods, including cross-sectional growth models, labor economics, political science, public opinion research, anthropology, education research, and much more.  You can knock some of this down by stressing the endogeneity of education, but at the end of the day the pile of evidence, and the diversity of its directions, is simply too overwhelming.

Should you bet on your own ability to lose weight?

Is that the stakes weren't high enough, or is the whole idea flawed?:

If obese individuals have time-inconsistent preferences then commitment mechanisms, such as personal gambles, should help them restrain their short-term impulses and lose weight. Correspondence with the bettors confirms that this is their primary motivation. However, it appears that the bettors in our sample are not particularly skilled at choosing effective commitment mechanisms. Despite payoffs of as high as $7350, approximately 80% of people who spend money to bet on their own behaviour end up losing their bets.

That's from Nicholas Burger and John Lynham.  Here is further information, from Economics Letters.  A gated copy is here.  A related paper, with similar results, is here.  The wise Alex, on same topic, is here.

The history of the UCLA economics department

I loved this essay-style interview, Dan Klein speaking with William R. Allen, on the glory days of the UCLA economics department, under the leadership of Armen Alchian.

It is taken from the latest issue of Econ Journal Watch, (I haven't read the other pieces yet).  There is also a systematic look at economists' role in signing petitions.

Western Cape prison gangs during and after apartheid

Have you ever seen a more appealing table of contents?:

Introduction

Chapter 1: Nongoloza and Kilikijan

Chapter 2: The functions of violence I–Making men (and not children)

Chapter 3: The functions of violence II–Making men (and not women)

Chapter 4: Prison on the streets, the streets in prison

Chapter 5: Warders and gangs

It starts off a little slow and cliched, but picks up.  Excerpt:

Once the drinking rituals have been completed and Kilikijan has discovered that his bandit brother drinks poison, Po instructs the two men to take the hide, drape it over the rock on which the band's diary is inscribed, and press it against the rock, until the diaries are imprinted on the animal's skin. The words of the diary, now duplicated–one on the rock, the other on the hide–are to become the law of the gang. Whenever there is a dispute about what bandits ought to do, Po says, consult the hide or the rock, because they are a record of how things were done at the beginning, and how things ought to be done in the future. Nongoloza rolls up the hide and takes it with him. Kilikijan is left with the rock.

That story is part of the opening myth of the piece.  Read the whole thing, especially if you're into "strange and compelling, while laden with Erving Goffmanesque social science."  It's ideal for Instapaper.  Suddenly there comes:

The notion that order in the prisons was maintained by a delicate system of unwritten rules is one that begs for a control experiment. What happens when one side breaks the rules, when either ndotas or warders threaten to kill one another? Interestingly enough, there was a kind of control experiment in the 1980s: the medium-security, criminal prison on Robben Island.

The original pointer comes from Bamber.

Would you like more “plain talk” from airline employees?

Robert, a loyal MR reader, writes to me:

Are there any airlines where the flight staff speak/behave more "naturally," as opposed to the robotic beauty queen default? I don't mean this in a snarky way. I'm just curious, since customers don't seem to be overly fond of the default mode, and some folks actively dislike it. I also imagine the enforced pleasantness to be a relatively tough/emotionally costly act for most flight attendants to keep up. However, I am not sure how customers would react to more natural flight-attendant speech, body language etc., given expectations of default behaviour.

My longstanding view is that half of them dislike or sometimes even despise their customers and that their natural speech patterns, given their true feelings, would come across negatively.  Perhaps Air Genius Gary Leff can comment on the cross-sectional variations vis-a-vis different airlines.  But the problem is a tough one.  They face lots of customers, with varying and often unreasonable expectations, and they have few resources to buy them off with.

In which sectors do the service staff have the highest opinions of their customers?  (Do you have nominations?  How about the old days at Tower Records?  How about an indie bookstore?)  I would expect a greater extent of plain speak in those situations.

What should we infer about doctors?  Ladies of the evening?  Economics professors?

Addendum: Gary responds.

Adam Phillips on happiness

For better and for worse, being able to feel our frustration is the precondition for becoming absorbed. When this is impossible the pursuit of happiness tends to take over. The right to pursue happiness may be, at its worst, the right not to feel frustrated. And if frustration is not allowed to take its course, to take its time, there is no absorption, only refuges from unhappiness. The child is fobbed off with happiness when what she really wants is to get her appetite back. The right to the pursuit of happiness can be a cover story for the wish to hide.

Here is much more, hat tip goes to The Browser,

The Small Schools Myth

Did Bill Gates waste a billion dollars because he failed to understand the formula for the standard deviation of the mean?  Howard Wainer makes the case in the entertaining Picturing the Uncertain World (first chapter with the Gates story free here). The Gates Foundation certainly spent a lot of money, along with many others, pushing for smaller schools. A lot of the push came because people jumped to the wrong conclusion when they discovered that the smallest schools were consistently among the best performing schools.

Schools1The chart at left, for example, shows by size the percentage of schools in North Carolina which were ever ranked in the top 25 of schools for performance. Notice that nearly 30% of the smallest decile (10%) of schools were in the top 25 at some point during 1997-2000 but only 1.2% of the schools in the largest decile ever made the top 25.

Seeing this data many people concluded that small schools were better and so they began to push to build smaller schools and break up larger schools. Can you see the problem?

The problem is that because small schools don’t have a lot of students, scores are much more variable.  If for random reasons a few geniuses happen to enroll in a small school scores jump up for that year and if a few extra dullards enroll the next year scores fall.

Thus, for purely random reasons we would expect small schools to be among the best performing schools in any given  year. Of course we would also expect small schools to be among the worst performing schools in any given year!  And in fact, once we look at all the data, this is exactly what we see. The figure below shows changes in fourth grade math scores against school size. Note that small schools have more variable scores but there is no evidence at all that scores on average decrease with school size.

States like North Carolina which reward schools for big performance gains without correcting for size end up rewarding small schools for random reasons. Worst yet, the focus on small schools may actually be counter-productive because large schools do have important advantages such as being able to offer more advanced classes and better facilities.

Schools2All of this was laid out in 2002 in a wonderful paper I teach my students every year, Thomas Kane and Douglas Staiger’s The Promise and Pitfalls of Using Imprecise School Accountability Measures.

In recent years Bill Gates and the Gates Foundation have acknowledged that their earlier emphasis on small schools was misplaced. Perhaps not coincidentally the Foundation recently hired Thomas Kane to be deputy director of its education programs.

Ignoring variance and how it relates to group size is a simple but common error. As Wainer notes, building on a discussion in Gelman and Nolan, counties with low cancer rates tend to be rural counties in the south, mid-west and west. Is it the clean country air or some other factor peculiar to rural counties which accounts for this fact? Probably not. The counties with the highest cancer rates also tend to be rural counties in the south, mid-west and west! Once again, small size and random variation appear to be the main culprit.