A new study by sociologist Crumb offers an interesting new perspective on this divide.“What we find is that there are many schools where boys and girls take high school physics at the same rate，” Crumb said.“And that there are many other schools where more girls actually take physics than boys.When you look at the total number，you see a pattern where boys are taking physics more than girls，but there is a lot of variation around that.”

　　There are some obvious things that could cause those variations.If parents of some kids are highly educated，they might push their daughters to take tough courses in high school.Wealthy families might be able to afford tutoring，or have one parent stay home to help kids with homework.

　　But when Crumb controlled for those and other possibilities，she found one reason remained：“What we found is that in communities that had a higher percentage of women in the labor force who are working in science，technology，engineering and math，girls were as likely as boys to take physics，or even more likely.”

　　“If I am a young woman growing up in a community or culture like that，then that’s what I see as，‘Well，this is what I am expected to do，’” Crumb said.“But if no one around me is doing those things，it’s hard for me to even consider that possibility.”

　　5．People often blame the gender diversity in tech on

　　.

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