That's such a silly article. There are so many confounding factors as to make any attempt at determining causation specious. Women's employment rate grew massively over that time period. This means that jobs requiring no specialized skills would receive an influx of job seekers. If we assume the employment rate of men stayed the same over that period, we would expect all jobs that require no specialized skills or physical demands would reduce in wages as the demand for those jobs increased. As far as computer programming goes, it literally was a clerical job early on. Wages rose as the job started requiring more specialized skills (which apparently women couldn't or didn't want to get).