David Waldron's blog

It's not difficult to find good data on the distribution of births by day of pregnancy. But when you get closer to or past your due date, those numbers become less helpful. What you really need at that point is a simple way to compare your pregnancy...

Nate Silver argues that Donald Trump is not actually supported by the working class. What is strange about his argument is that he looks at the median income of Trump supporters by state, calculated from exit polling data*. Exit polls break down candidate...

This is pretty self-explanatory. Based on 2010 Decennial Census data at the block level, where are the homeowners and renters in the MSP metro area? One dot = one person.
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I allowed for the homeowners and renters to be pictured separately because it nicely shows the different patterns. The homeowners tend to be spread fairly evenly, with a few holes here and there, while the renters are clustered in high density areas...

Christopher Ingraham at the Washington Post writes about how "data journalists" can create drastically different visualizations of the same data. Specifically, he criticizes a choropleth map recently published by Pew Charitable Trusts that shows population...