A record-breaking new class-action lawsuit against Wal-Mart claims that this retail chain discriminates against women, for which of course vast millions of dollars are being demanded. The New York Times aptly summarized the case -- "about 65 percent of the company's hourly-paid workers are women, but only 33 percent of its managers are."
The grand fallacy of our times is that various groups would be equally represented in institutions and occupations if it were not for discrimination. This preconception has undermined, if not destroyed, the crucial centuries-old legal principle that the burden of proof is on the accuser.
Wal-Mart is only the latest in a long series of employers who have been hit with charges of discrimination on the basis of statistical differences among members of their workforce -- differences between women and men in this case.
Back during the 1980s a similar charge was brought against Sears, even though no one could find a single woman in all the hundreds of Sears stores who had been discriminated against -- just numbers that were different as between women and men.
When you broke down the numbers, it turned out that women were not equally represented among people who sold automotive equipment or construction materials. It also turned out that many women had no interest in selling automotive equipment or construction materials, and had turned down opportunities to do so.
In many other situations, women have avoided jobs that demand such long hours of work, or so much travel, that it would make taking care of their children virtually impossible. The biggest difference in income is between married women and everyone else. Women who never married have long held their own economically.
The most blatant fact about male-female differences is often ignored by those on the hunt for discrimination: Women have babies.
That usually means interruptions in careers and different choices of careers beforehand, because some occupations can stand interruptions better than others.
It is hardly surprising that women work part-time more often than men, drop out of the labor force more often than men, specialize in a different mix of jobs, and major in a different mix of subjects in college and postgraduate education.
Seldom are the data sufficiently detailed to permit comparisons of women and men who are the same on all the variables that matter. But the more detailed the data, the higher is a woman's income relative to that of a comparable man, sometimes surpassing that of men.
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