Productivity puzzles, or are we seeing a miracle?

Here is the ever-insightful Brad DeLong on why the current productivity and employment data are so hard to understand. Read Brad here and here (a longer, more technical post) for more context. The key point is this: many companies are prospering, and increasing absolute output, even as they are laying off workers. The implied numbers for productivity increases, per remaining worker, are simply astounding.

Why do intellectuals oppose capitalism?

This essay by the deceased Robert Nozick has a few years on it, but I never knew there was an on-line version. It is the best piece I know on why so many intellectuals oppose capitalism. See my earlier blog post on the inability of some researchers to find a single registered Republican within some departments of MIT and other universities (of course Republicans commonly fail capitalism but I suspect that is not the objection of the MIT faculty). With thanks to Cato, Newmarksdoor, and BrianMicklethwait.com.

Here is one excellent sentence of many:

“The intellectual wants the whole society to be a school writ large.”

Bhagwati criticizes the WTO

Read this on how the WTO is becoming a forum to regulate the behavior of the poorer nations, rather than bring free trade. Eminent trade economist Jagdish Bhagwati of Columbia University calls WTO a “sham,” and a “legal…straitjacket of do’s and don’ts…”

Here is a money quote:

“The developing countries are scared out of their wits now,” Bhagwati says, “because they don’t understand what they’re being forced to sign. The agreements are going way outside the trade issues and involve a helluva lot of things like your access to oil, your access to intellectual property and capital controls…. When I looked through the investment agreements, it was worse than reading my insurance policy for the fine print. I couldn’t make anything out of it, and I’m a reasonably informed person, a pretty smart economist as they go.”

Mars in the Balance?

According to an article in the 23 Aug. issue of New Scientist magazine (unfortunately not available online to non-subscribers) scientists have been “absolutely shocked” to find that glaciers in the south pole have been “eroding at a rate of 3 meters per year or more.” According to one scientist “all the visible ice, all the carbon dioxide that we see in the ‘permanent’ ice cap could be eroded in less than a century.”

The scientists agree that the only plausible explanation of what they are seeing is “climate change” but none of them think that humans are to blame. Why not? The scientists are talking about Mars. The article doesn’t make the connection but it seems to me that global warming on Mars raises the plausibility of claims by global warming skeptics that solar activity could be responsible for much climate change on Earth. Here is a picture from Friis-Christensen and Lassen’s 1991 paper on this issue in Science (link to JSTOR, click on the picture to expand).

sunspots.JPG

Do you know what made you happy?

Nobel Laureate Daniel Kahneman is engaged in some fascinating work, read this summary:

“…the duration of an experience plays essentially no role when evaluating how well it becomes etched in our memories.

Kahneman believes the most direct way to evaluate experienced utility is to ask people how they feel at a certain moment, a notion he calls “moment utility.”…But because researchers are more interested in extended outcomes, more often the question they ask is memory-based: “How was it?” Kahneman said this is a different question that reflects the individual’s global evaluation of an entire episode in the past and it may not be a direct assessment of the individual’s real-time state. This “remembered utility,” said Kahneman, is not a very good guide when predicting outcomes. The “total utility” of a state is derived from the moment-based approach of measuring the real time pleasure or pain experienced by the individual.”

In other words, one of our selves does the living, another keeps the memories.

“”When people make decisions, the remembering self is in control, Kahneman explained. “We make our decisions in terms of our memories and basically, we maximize remembered utility, not the actual total utility,” he said. “The only thing we can learn to maximize through personal experience is remembered utility.””

And don’t you forget that.

Also read our earlier blog posts on whether people understand their own happiness, here, and here.

If Shemekia were Sally would she earn more?

Steve Levitt, recenty profiled in the NYT Magazine has written another amazing and sure to be controversial paper. Levitt and co-author Roland Fryer begin The Causes and Consequences of Black Names with some startling statistics on the racial divide in names. For example, “more than forty percent of Black girls born in California in recent years received a name that not one of the roughly 100,000 white girls born in California in that year was given.” Blacks are more segregated by name than are other races – the majority of Asians, for example, choose from the same name-pool as do whites. Segregation by naming has also increased over time. Prior to the late 1960s, for example, blacks and whites chose from the same name-pool to much greater degree than they do today.

Other studies have shown that when sent resumes identical but for name, employers more frequently ask for follow-up interviews with applicants who have stereotypical white names. Levitt and Fryer respond to these studies in two ways. The first response I find unconvincing. They argue that it is unlikely that a black name could have a big impact on earnings because “Once an employer has met a candidate in person, race is directly observable. A person’s manner of speaking, dress, interview responses and on-the-job performance no doubt provide far better signals of productivity than a name.” No doubt – but this is a rather facile interpretation of the audit studies. The point of these studies was not the literal one that employers discriminate on the basis of a person’s name! The point is that if employers use names to discriminate on race at the resume stage then they probably discriminate on race at every other stage in ways that are harder to identify.

Levitt and Fry have a more convincing but sure to be controversial response to this larger issue. They find that black names signal a variety of other characteristics that could plausibly be connected with lower labor productivity. Here is a key quote:

a woman with a BNI equal to one (implying a name that no Whites have) is 10 percentage points more likely to have been born to a teenage mother and 9 percentage points more likely to have been born out-of-wedlock than a Black woman living in the same zip code with the same age and education, but carrying a name that is equally common among White and Blacks. The woman with a Black name is also more likely to have been born in a Black neighborhood and to herself be unmarried.

In other words, names carry information even after the typical information available on a resume has been taken into account and the information that especially black names carry plausibly suggests lower productivity. It’s papers like this that explain why professors need tenure.

Who are the most partisan columnists?

Lyinginponds.com provides a running tab on which media writers toe a particular political line. The “winners” for the Total Partisanship Index are the following individuals, with 100 on the scale meaning pure partisanship:

Ann Coulter – 77
Paul Krugman – 74
Robert Scheer – 72
Molly Ivins – 68
Frank Rich – 61

The numbers try to measure how much the writer sides with one political party rather than the other. Click on the links for full explanations of the various indices.

Are student evaluations a good idea?

Here is Michael Huemer’s very interesting critique of student evaluations of professors, full of cites and links. Yes, student evaluations correlate positively with other measures of teaching effectiveness. Take multiple sections of the same course and give a common final exam, the correlation is in the neighborhood of 0.4 to 0.5.

On the other hand, a professor gets a much better evaluations if students think they will get good grades. The statistical correlations are strong and hard to deny. And in one study 70 percent of students admitted that their evaluation was influenced by the grade they expected to get. See this game theory article on how one-shot reciprocity can work.

In one survey, 38 percent of professors admitted to dumbing down their courses to get better evaluations.

Cosmetic factors such as appearance have a big influence on evaluations.

Huemer offers no policy conclusion. He does note that ratings by colleagues and other observers do not agree with each other very much and thus cannot stand as a serious alternative.

If you are curious, I could not find Huemer’s student evaluations through a web search.

Global warming update

Fungi under the snow may contribute significantly to CO2 levels, according to this Washington Post article (brief registration required). Here is one bit:

“We’re living in a world where global warming is a constant threat, but in fact we have relatively little knowledge of what the inputs and outputs are for CO2.” said Steven Miller, a mycologist, or fungus specialist, at the University of Wyoming.”

Here is another:

“…global warming models can no longer ignore fungi in snowy regions and seasons as they have, scientists said – especially because about 40 percent of Earth’s landmass is covered with snow for at least part of the year.”

I am not one of those economists who wishes that global warming would go away, and simply assumes that science is on my side, or reads the evidence selectively. And of course items such as this can be cause for either optimism or pessimism, what if fungi under the snow contribute to a crisis rather than easing it? Still, Bush was not crazy to refuse to go along with Kyoto.

Do scientists know what makes you happy?

Tyler disagrees (see his entry below for more information) with Loewenstein on the implications of happiness research. It’s evident that the key figures also come to different conclusions on even simple policy questions. Consider the following quotes from the NYT Magazine article (written by Jon Gertner):

One experiment of Gilbert’s had students in a photography class at Harvard choose two favorite pictures from among those they had just taken and then relinquish one to the teacher. Some students were told their choices were permanent; others were told they could exchange their prints after several days. As it turned out, those who had time to change their minds were less pleased with their decisions than those whose choices were irrevocable.

Yet just a few pages we are told that Daniel Kahneman, recent Nobel prize winner and another key player in this field, “sees a role for affective forecasting on consumer spending where a ‘cooling off’ period might remedy buyer’s remorse.”

Do you know what makes you happy?

“You are wrong to believe that a new kitchen will make you happy for as long as you imagine.”

Conversely, a tense marriage or a trick knee will give you more agony than you think. But most things matter less than we think they will, an old theme from the seventeenth century French moralist La Rochefoucauld. There is a good deal of experimental evidence that we make these “happiness mistakes” time and again, failing to learn from experience.

So argues Daniel Gilbert, professor of psychology at Harvard, profiled in today’s New York Times Magazine (registration required). Daniel Kahneman, last year’s Nobel Laureate in economics (with Vernon Smith), once told me that time spent with friends, not new gadgets, is what people really enjoy.

Our brains are trying to regulate our behavior, not trying to make us happy. According to Tim Wilson,

“We don’t realize how quickly we will adapt to a pleasurable event and make it the backdrop of our lives. When any event occurs to use, we make it ordinary. And through becoming ordinary, we lose our pleasure.”

We systematically fail to realize how powerful our psychological defenses are, once those defenses become activated. But Gilbert suggests we might need these carrots and sticks to get things done, even if they are illusions.

George Loewenstein, an economist at Carnegie-Mellon, says

“…he [Loewenstein] doesn’t see how anybody could study happiness and not find himself leaning left politically; the data make it all too clear that boosting the living standards of those already comfortable, such as through lower taxes, does little to improve their levels of well-being, whereas raising the living standards of the impoverished makes an enormous difference.”

I buy the basic claims about happiness, but dispute the political conclusion. To the extent we should care about happiness, our imperative is to boost the rate of economic growth, strengthen Western civilization, and hope that Western-style institutions spread around the world. All of these mean a heavy reliance on markets, incentives, and the rule of law.

The mind of Paul Krugman

Here is an interview with Paul Krugman, talking for the left-wing audience of LiberalOasis and thus, believe it or not, less restrained than usual. Here is one revealing bit, talking about the United States post-9/11: “I felt for a little while there like I was all alone, [that] they’re all mad but me.”

He also uses the phrase “My finest hour” is a non-ironic way, when speaking of the California energy crisis.

He talks about his new book The Great Unraveling: Losing Our Way in the New Century as well. I will offer some comments once my copy arrives.