First of all, the Department of Labor Report wasn't one study, it was a compilation of data of over 50 peer reviewed papers. No one ever said there is no gap unequivocally, but the "gap" as it is spoken of is patently false. There may be a gap of around 4 to 7 percent, but that is a far cry from the 23% hysteria, and no evidence that this significantly smaller disparity is the result of discrimination. The report concluded that it may all very well be explained away by differing choices between men and women in the labor market.
“In principle, more of the raw wage gap could be explained by including some additional variables within a single comprehensive analysis that considers all of the factors simultaneously; however, such an analysis is not feasible to conduct with available data bases. Factors, such as work experience and job tenure, require data that describe the behavior of individual workers over extended time periods. The longitudinal data bases that contain such information include too few workers, however, to support adequate analysis of factors like occupation and industry. Cross-sectional data bases that include enough workers to enable analysis of factors like occupation and industry do not collect data on individual workers over long enough periods to support adequate analysis of factors like work experience and job tenure.
Although additional research in this area is clearly needed, this study leads to the unambiguous conclusion that the differences in the compensation of men and women are the result of a multitude of factors and that the raw wage gap should not be used as the basis to justify corrective action. Indeed, there may be nothing to correct. The differences in raw wages may be almost entirely the result of the individual choices being made by both male and female workers.”
http://www.consad.com/content/reports/Gender Wage Gap Final Report.pdf
The problem is, your graph doesn't mean anything, doesn't account for differences hours worked or experience for example. In both cases, on average, full time male workers work more hours, and as you even admitted, don't have the same gaps in work experience due to taking off time for being with children, the so called "motherhood penalty".
The Labor Department defines full-time as 35 hours a week or more, and the "or more" is far more likely to refer to male workers than to female ones. According to the department, almost 55% of workers logging more than 35 hours a week are men. In 2007, 25% of men working full-time jobs had workweeks of 41 or more hours, compared with 14% of female full-time workers. In other words, the famous gender-wage gap is to a considerable degree a gender-hours gap.
Kay Hymowitz Why Women Make Less Than Men - WSJ
The difference in hours worked alone explains away about 25% of t the so called 77% myth.
The Department of Labor’s Time Use Survey, for example, finds that the average full-time working man spends 8.14 hours a day on the job, compared to 7.75 hours for the full-time working woman. Employees who work more likely earn more. Men working five percent longer than women alone explains about one-quarter of the wage gap.
It s Time That We End the Equal Pay Myth - Forbes
You just keep bringing out the same rehashed and debunked statistic that doesn't account for any of the factors mentioned.
If your hypothesis were true, and women that work equal hours for the same work, and have the same education level and experience in the field, were paid 78% of men, profit maximizing companies would only hire women. But as I said before, the stats don't bare this out.
Absurd claims, as usual from the right...absurd to claim your flawed study debunks anything, Absurd to claim none of the other studies take into account any of those factors. But of course, those studies were not done by conservatives paid for by corporate dollars.
Here is the "study" you are trying to present as factual...
The study by Consad Research Corp. commissioned by the U.S. Department of Labor examined more than 50 peer-reviewed papers and estimated that the 77% wage gap "may be almost entirely the result of individual choices being made by both male and female workers."
But the researchers also warned that either they did not have enough long-term data or the studies they looked at had too few workers to definitively ascertain why exactly the wage gap exists, as well as the size of it.
The government researchers also warned they did not have enough data to ascertain the impact of various factors like work experience, tenure, occupation and industry to deliver “adequate analysis” of what the true wage gap really is.
Specifically, the Consad researchers warned that “data bases that contain such information include too few workers, however, to support adequate analysis of factors like occupation and industry” or “do not collect data on individual workers over long enough periods to support adequate analysis of factors like work experience and job tenure.”
They also warned: “As a result it has not been possible to develop reliable estimates of the total percentage of the raw gender wage gap,” though their statistical analysis “produced results” that showed the pay gap could be between 93% and 95%.
It’s not just the fact that use of the word “may” is prevalent throughout the study, showing the research is far from conclusive. The Consad Research report itself indicated the analysis merely gives signposts of what could be the cause, and repeatedly warned that “the data for other factors was not available” to definitively determine why the pay gap exists.
Missing, too, is a huge whopper that could cause the wage gap. Due to a lack of data, the researchers could not include in their analysis whether women are rejected from jobs they apply for right from the get go because they have children, even if they had resumes identical to men—an all too prevalent reality that undercuts the theory that the “pay gap doesn’t exist.”