The White House has been touting open data initiatives for years. But in one of the most controversial areas in politics — immigration — crucial data is often unavailable, and what’s available often includes mistakes, say a diverse set of critics.

The IEEE-USA is a case in point. The group has been trying for nearly two years to discover how many H-1B visa holders are male. It believes men get as many as 85% of the visas, a percentage that can help explain the lopsided male and female ratios at visa-hiring companies such as Facebook (69% male), and Google (70% male).

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