Textbooks do not matter

I have complained before, and I am far from being the only one, that textbooks are too expensive. But we still use them because we think they are useful, or because we are too lazy to come up with class material ourselves. Beyond the benefit for the lazy teacher, do textbooks actually bring something to the classroom?

Maria Kuecken and Marie-Anne Valfort looks at a case where textbooks are sometimes simply not available, classrooms in 11 Sub-Saharian countries. And it turns out the availability of textbooks does not matter, whether owned by each pupil or shared. It is only in one case, the richer kids, where there is a noticeable improvement in school achievement for shared textbooks. So it looks like teachers manage to adapt well to the absence of textbooks. And I think there is virtue in working without them: students have to listen to the teacher, learn to take notes or absorb material on the spot, and they are more active in the classroom. I wish I could go without textbooks, but unfortunately rules are rules. And publishers also need to make a living, right?

The option of suicide

Suicide is a trigger strategy and when to pull the trigger is a decision that involves forming expectations over future outcomes. It is a difficult decision, as future outcomes are very uncertain, if not difficult to quantify.

Shin Ikeda models the suicide decision as the decision to exercise an American option on future wages. Seen this way, the suicide option is straightforward to quantify once you have wage profiles of suicide candidates (to determine timing) and non-candidates (to determine future wage profiles, their distribution and how they may differ form suicide candidates). From anecdotal evidence, anxiety seems to be an important factor, thus modeling at least risk aversion right is very important, as well as bankruptcy. Unfortunately, this is not at all how the paper proceeds. Individuals are risk neutral, but returns are adjusted for market risk. Individuals hold no assets or debt, except their human capital. The wage process is identical for everybody. It is then no surprise that the results are not realistic, indicating that the strike price corresponds to 90% of the average initial wage in perpetuity, meaning that a majority of workers is at suicide risk at some point during their life. Any study in the value of life literature gives numbers much higher than this value, and this is because people value more than just wages. Instead of only looking at money flows, one needs to consider concepts like utility and preferences...

The Latest from Merle Hazard

Babysitting and labor market outcomes

It is well established that what happens early in life matters a lot for adult outcomes. But some adult life choices may rather be influenced by event later in childhood, like what to study in college or which profession to take on, controlling for all the cognitive skills that seem to be largely set by then.

Zeynep Erdogan, Joyce Jacobsen and Peter Kooreman look at the impact of having worked as a teenager, and in particular as a babysitter, on fertility and labor market outcomes. Results are a mess, and I suspect that endogeneity and selection bias have a lot to do with it. The authors, though, find one rather strong result: Working during 10th grade has a positive impact on labor market outcomes and delays fertility. It is rather strange that having babysat (at a specific age) would encourage a woman to have children later. But babysitting in general leads to having more children, according to their results. That all looks like spurious correlations to me, especially as instrumental variable results looks very different from OLS ones.

Depopulation or the Detroitification of Japan

There is a spectre haunting the developed world--the spectre of Detroitification. (Take that, Marx and Engels!) It involves depopulation and industrial hollowing out destroying the tax base of locales barely able to provide basic public services. Aside from the highly questionable logic of Japan incurring more debt to "cure" problems arguably caused by an oversized debt overhang, I have a more fundamental doubt about its economy moving forward. Simply, demographics dictate that an ever-shrinking population places nearly-insurmountable pressure on enfeebling the economy. Too many seniors drawing on too many benefits compared to too few working-age persons--it's a bad situation only set to get worse:

The estimate shows that Japan’s population in 2040 will stand at 107.276 million, a decline of about 20 million from 2010′s 128.057 million. A January 2012 estimate by the same [National Institute of Population and Social Security Research] institute had shown that in 2060, Japan’s population will number 86.737 million, about 30 percent less from the 2010 level.

Japan has been experiencing a natural population decrease since 2007, with annual deaths topping births. In 2011, the total fertility rate — the average number of babies a woman gives birth to during her life — was 1.39. A total fertility rate of 2.07 is required to maintain population levels. Although the public sector has been taking steps to make it easier for women to have more children, it will be extremely difficult to improve the situation.

While industrial stagnation is perhaps less evident in Japan at the moment, the fiscal implications of these hollowed-out societies remain the same. There are already signs of Detroit-esque lapses in the provision of public services emerging:

The progress in the graying of the nation means that the need for social services for residents such as medical and nursing care services will increase. The population decrease means that the nation’s total tax revenues will decline. As a result, grants from the central government to local governments will diminish. Both the central and local governments must find ways to overcome the imbalance between revenues and outlays. It will become all the more important for both the public and private sectors to increase chances for women to fully utilize their abilities in the workforce.

The effects of a population decrease are already being felt. Cases in which road bridges have been closed to traffic because of a lack of funds for maintenance and a drop in the number of users are increasing. Forests exist whose owners are now unknown. The number of vacant houses are increasing. Some municipalities have passed by-laws under which they will demolish vacant houses that have become dangerously dilapidated [my emphasis].

The spectre of Detroitification is hard to beat, and its footprints are unmistakeable.With current leader Shinzo Abe unwilling to consider meaningful migration reform as a solution thus far, it's the Motor City writ large and not Godzilla that's looming ominously in Japan's skyline.

A New Job for Raghu Rajan

He's becoming a central banker.

Human capital and corruption

It is commonplace to assume that corruption is bad, although the evidence is far from clear about this. Empirical investigations are typically at the macro level and have very little to say about the micro channels of corruption. In fact there is very little structural modelling or estimation in this area.

Spyridon Boikos concentrates on the impact of corruption on the accumulation of human capital using an endogenous growth model. Two channels are investigated: the first is about public resources being misdirected being education and production sectors, and the second is complementarity between human and physical capitals. Putting this to the data, it is found that corruption does not have that much impact in the education sector, and it is conjectured that corruption does not have the same bite in the education sector as in the rest of the economy. I cannot help thinking that the model misses the big elephant in the room in terms of human capital and corruption: a very common form of corruption in this regard is bribing for entry into schools, passing exams and even getting diplomas. This means that the signalling effect of diplomas is getting lost, and hence the incentive to get an education vanishes, in particular for the talented ones. And for those who attend a school, there is little incentive to learn.