If you finish high school and don't have a child until you are married and are at least 20 years old, your chances of being poor are only eight percent. Rick Santorum has turned findings like this into a testament to the value of marriage and a prescription for reducing the black poverty rate. But are these kinds of statistical correlations really very useful? John McWhorter of Columbia University and Glenn Loury of Brown University debate the question:
Can a band of locomotive experts save vintage railcars from ruin?