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Re:Google Fires Employee Behind Controversial Diversity Memo by depressedpanda on Wednesday August 09, 2017 @12:03PM (#14970606)
No, unfortunately it isn't always 'very measureable'. Read your sibling comment; sometimes the government has the necessary data but refuses to release it to anyone.

Providing proof may then become prohibitively expensive, and sometimes impossible.

Re:Google Fires Employee Behind Controversial Diversity Memo by BeetleB on Thursday August 10, 2017 @10:53AM (#14980294)
Do a large scale random sample survey and you'll already learn a lot. The government may have a lot of data, but you don't need it from them.

Even in the US, a lot of data is not released on the grounds of confidentiality. That doesn't block doing research on the topic.