The Economist discusses a new OECD report on a growing gender gap in schools:


The reversal is laid out in a report published on March 5th by the OECD, a Paris-based rich-country think-tank. Boys’ dominance just about endures in maths: at age 15 they are, on average, the equivalent of three months’ schooling ahead of girls. In science the results are fairly even. But in reading, where girls have been ahead for some time, a gulf has appeared. In all 64 countries and economies in the study, girls outperform boys. The average gap is equivalent to an extra year of schooling.

The gap is particularly stark at the bottom, with teenage boys “50% more likely than girls to fail to achieve basic proficiency in any of maths, reading and science.” While Larry Summers got crucified for referring to male-female differences in variation in different human traits, the higher rates of low proficiency among boys reflects the often ignored consequence of Summers’s statement - more males at the bottom.

The article notes other explanations for the gap such as time doing homework, attitude to school and reading at home, but one of the more interesting explanations might be discrimination:


There are likely ways to improve test outcomes for some of the lowest performing students. Anonymised tests could be one.

But will the net result of interventions to increase male or female school performance open or close the gap? Making the environment the same for everyone will exacerbate innate differences. Different teaching environments for boys and girls may maximise performance, but again, it’s not clear what size the gap would be under that arrangement (Or teaching could be adjusted based on traits such as IQ and big five personality traits - females tend to score higher on agreeableness and conscientiousness - removing direct discrimination, but effectively treating boys and girls differently on average)

The advantage of females over males continues through to tertiary education:


Even in the handful of OECD countries where women are in the minority on campus, their numbers are creeping up. Meanwhile several, including America, Britain and parts of Scandinavia, have 50% more women than men on campus. …


So why does the income gap persist in the workforce? The Economist article closes with research by Claudia Goldin:

In a recent paper in the _American Economic Review_ Ms Goldin found that the difference between the hourly earnings of highly qualified men and their female peers grows hugely in the first 10-15 years of working life, largely because of a big premium in some highly paid jobs on putting in long days and being constantly on call. On the whole men find it easier than women to work in this way.

It is not easy to develop a policy response to this, nor for a business to try to close the gap without trade-offs. One possibility is gender quotas, although this may largely operate to the advantage of women who do not take time off for family reasons.

Another option is to require men to take paternity leave when they have children. But this penalises both men and women who have children. I am all for people bearing the costs of their children, but a policy to exacerbate those costs in the workplace seems misplaced.

Another question around this option is why time out of the workplace relating to children is specifically targeted. What of those who want to travel, study or volunteer for charity, each of which surely come with costs?

A less prescriptive response is reflected in the closing part of Goldin’s paper, where she writes:

The last chapter must be concerned with how worker time is allocated, used and remunerated and it must involve a reduction in the dependence of remuneration on particular segments of time. It must involve greater independence and autonomy for certain types of workers and the ability of workers to substitute seamlessly for each other. Flexibility at work has become a prized benefit but flexibility is of less value if it comes at a high price in terms of earnings. The various types of temporal flexibility require changes in the structure of work so that their cost is reduced.

Goldin mentions that some jobs necessarily involve long hours and availability at all times. These professions will be resistant to a closing of the gap. However, for jobs that do not require long hours, how easy it is to replace time-based measures? Outputs in many of those jobs are credence goods (think of a lot of output from consulting or even law). Hours worked may be the only tangible measure the employers and clients have.