Look for a study called "The EU vs. USA," done in 2004 by two economists - Fredrik Bergstrom and Robert Gidehag for the Swedish think tank Timbro.
Some highlights:
If Europe were part of the U.S., only tiny Luxembourg could rival the richest of the 50 American states in gross domestic product per capita. Most European countries would rank below the U.S. average
U.S. GDP per capita was a whopping 32% higher than the EU average in 2000, and the gap hasn't closed since. It is so wide that if the U.S. economy had frozen in place at 2000 levels while Europe grew, the Continent would still require years to catch up. Ireland, which has lower tax burdens and fewer regulations than the rest of the EU, would be the first but only by 2005. Switzerland, not a member of the EU, and Britain would get there by 2010. But Germany and Spain would need until 2015, while Italy, Sweden and Portugal would have to wait until 2022.
Higher GDP per capita allows the average American to spend about $9,700 more on consumption every year than the average European. So Yanks have by far more cars, TVs, computers and other modern goods. "Most Americans have a standard of living which the majority of Europeans will never come anywhere near," the Swedish study says.
But what about equality? Well, the percentage of Americans living below the poverty line has dropped to 12% from 22% since 1959. In 1999, 25% of American households were considered "low income," meaning they had an annual income of less than $25,000. If Sweden--the very model of a modern welfare state--were judged by the same standard, about 40% of its households would be considered low-income.
In other words poverty is relative, and in the U.S. a large 45.9% of the "poor" own their homes, 72.8% have a car and almost 77% have air conditioning, which remains a luxury in most of Western Europe. The average living space for poor American households is 1,200 square feet. In Europe, the average space for all households, not just the poor, is 1,000 square feet.