NOTE: Other than whats below you can add this for side effect: https://freebeacon.com/culture/google-study-to-address-wage-gap-finds-company-is-underpaying-men/

The next time someone brings up "the wage gap" simply copy paste the following:

Theres a large number of things contributing to the "Wage gap"

Here are sources to some researches of factors and some researches dubunking it:

https://qz.com/149428/mens-overtime-hours-are-keeping-the-gender-pay-gap-alive/

http://mypage.iu.edu/~cha5/Youngjoo_Cha_files/Cha_weeden.pdf

https://www.npr.org/2011/02/14/133599768/ask-for-a-raise-most-women-hesitate

https://slate.com/human-interest/2009/10/do-women-really-ask-for-raises-less-frequently-than-men.html

https://www.usatoday.com/story/travel/2013/04/25/vacation-travel-study/2110505/

https://www.telegraph.co.uk/news/health/10660612/Women-are-almost-42-per-cent-more-likely-to-take-sick-days-than-men.html

http://business.time.com/2010/11/30/are-women-less-competitive-than-men-explaining-the-gender-gap/

https://www.telegraph.co.uk/news/science/evolution/9005552/Men-twice-as-likely-to-take-risks.html

https://www.sciencedaily.com/releases/2015/07/150730120853.htm

https://www.pnas.org/content/pnas/112/40/12354.full.pdf

https://www.forbes.com/sites/nextavenue/2013/05/16/women-retire-earlier-than-men-but-dont-have-to/#3d57fa747888

http://crr.bc.edu/wp-content/uploads/2015/03/IB_15-4.pdf#page=4

https://www.cheatsheet.com/money-career/how-much-is-the-average-retirement-age-really-rising.html/?a=viewall

https://www.bls.gov/iif/oshwc/cfoi/cfch0009.pdf#page=10

https://www.forbes.com/sites/lorikozlowski/2012/03/22/women-in-tech-female-developers-by-the-numbers/#4af803cb1760

https://www.veterinarypracticenews.com/women-in-veterinary-medicine/

https://www.huffingtonpost.com/christina-hoff-sommers/wage-gap_b_2073804.html

https://www.theatlantic.com/business/archive/2013/05/the-biggest-myth-about-the-gender-wage-gap/276367/

https://slate.com/human-interest/2013/08/gender-pay-gap-the-familiar-line-that-women-make-77-cents-to-every-mans-dollar-simply-isnt-accurate.html

https://www.cbsnews.com/news/the-gender-pay-gap-is-a-complete-myth/

https://fee.org/articles/harvard-study-gender-pay-gap-explained-entirely-by-work-choices-of-men-and-women/

Oh and if youre gonna pull the "anything we dont know is sexism" and say STEM fields have less women because of sexism, heres proof thats wrong too:

http://gap.hks.harvard.edu/national-hiring-experiments-reveal-21-faculty-preference-women-stem-tenure-track