NPR looks into the vague and often contradictory rules for determining who is Hispanic, and why it matters.

Who is Latino? Who counts as Native American?

The debate over who is considered a minority was brought to the spotlight by the Senate race in Massachusetts. Democratic candidate Elizabeth Warren claimed she had Native American heritage, but there's no records to indicate that. Still, Warren insists that she learned of her background through family stories and that she is proud of her heritage.

Today, The New York World ran a story that talks about the real-world implications of these questions. Essentially a New York City program that assists minority business owners is asking Latinos to provide proof of their ethnicity by showing a birth certificate and an affidavit confirming their ethnic identity.

Read the whole story here.