Richard Fisher, the president of the Federal Reserve Bank of Dallas, dropped by our offices this week and relayed a remarkable fact: Some 37% of all net new American jobs since the recovery began were created in Texas. Mr. Fisher's study is a lesson in what works in economic policy—and it is worth pondering in the current 1.8% growth moment.

Using Bureau of Labor Statistics (BLS) data, Dallas Fed economists looked at state-by-state employment changes since June 2009, when the recession ended. Texas...