As for women making less money, it's illegal in most countries that work places would have men and women doing the same job for different wages, so no that's not how it works. Women are usually associated with a certain kind of job that pays less, mostly. You will not see a male secretary very often, but you will see female ones doing a whole shitload of work that goes way beyond the definition of the job and so on.
The stats are taken by tax declarations, surveys and the like. Something like: among the people who make minimum age, 60% of them are women, for example. Women are majority among the poorest in the world obviously, and specially because many of them are single mothers, having to raise children on one income, or even with some $ help from the fathers they take care of the kids, making their career and education pursue more difficult, they are also the ones to perpetuate poverty.
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