Do economic rivalries between Texas and California or New York and Florida feel like yet another sign that America has become hopelessly divided? There is a bright side to their disagreements, and a new ranking of economic freedom across the states helps explain why.

As a popular bumper sticker among economists proclaims: “I heart federalism (for the natural experiments).” In a federal system, states have wide latitude to set priorities and to choose their own strategies to achieve them. It's messy, but informative.

New York and California, along with other states like New Mexico, have long pursued a government-centric approach to economic policy. They tax a lot. They spend a lot. Their governments employ a large fraction of the workforce and set a high minimum wage.

They aren’t socialist by any means; most property is still in private hands. Consumers, workers, and businesses still make most of their own decisions. But these states control more resources than other states do through taxes and regulation, so their governments play a larger role in economic life.

At the other end of the spectrum, New Hampshire, Tennessee, Florida, and South Dakota allow citizens to make more of their own economic choices, keep more of their own money, and set more of their own terms of trade and work.

They aren’t free-market utopias; they impose plenty of regulatory burdens. But they are economically freer than other states.

These two groups have, in other words, been experimenting with different approaches to economic policy. Does one approach lead to higher incomes or faster growth? Greater economic equality or more upward mobility? What about other aspects of a good society like tolerance, generosity, or life satisfaction?

For two decades now, we’ve had a handy tool to assess these questions: The Fraser Institute’s annual “Economic Freedom of North America” index uses 10 variables in three broad areas — government spending, taxation, and labor regulation — to assess the degree of economic freedom in each of the 50 states and the territory of Puerto Rico, as well as in Canadian provinces and Mexican states.

It’s an objective measurement that allows economists to take stock of federalism’s natural experiments. Independent scholars have done just that, having now conducted over 250 studies using the index. With careful statistical analyses that control for the important differences among states — possibly confounding factors such as geography, climate, and historical development — the vast majority of these studies associate greater economic freedom with greater prosperity.

In fact, freedom’s payoffs are astounding.

States with high and increasing levels of economic freedom tend to see higher incomes, more entrepreneurial activity and more net in-migration. Their people tend to experience greater income mobility, and more income growth at both the top and bottom of the income distribution. They have less poverty, less homelessness and lower levels of food insecurity. People there even seem to be more philanthropic, more tolerant and more satisfied with their lives.

New Hampshire, Tennessee, and South Dakota topped the latest edition of the report while Puerto Rico, New Mexico, and New York rounded out the bottom. New Mexico displaced New York as the least economically free state in the union for the first time in 20 years, but it had always been near the bottom.

The bigger stories are the major movers. The last 10 years’ worth of available data show South Carolina, Ohio, Wisconsin, Idaho, Iowa and Utah moving up at least 10 places. Arizona, Virginia, Nebraska, and Maryland have all slid down 10 spots.

Over that same decade, those states that were among the freest 25% on average saw their populations grow nearly 18 times faster than those in the bottom 25%. Statewide personal income grew nine times as fast.

Economic freedom isn’t a panacea. Nor is it the only thing that matters. Geography, culture, and even luck can influence a state’s prosperity. But while policymakers can’t move mountains or rewrite cultures, they can look at the data, heed the lessons of our federalist experiment, and permit their citizens more economic freedom.

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Matthew D. Mitchell is a senior fellow with the Centre for Human Freedom at the Fraser Institute and a senior affiliated scholar with the Mercatus Center at George Mason University.

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