A new measurement tool eliminates the inaccuracies that have plagued data about housing supply, helping governments more clearly understand how housing policies are impacting local needs.

How the U.S. government measures race has changed substantially since censuses began in 1790. Today, Americans differ on whether the government should ask about race.

Racial categories, which have been on every U.S. census, have changed from decade to decade, reflecting the politics and science of the times.