In the hardest places to live in the United States, people spend a lot of time thinking about diets and religion. In the easiest places to live, people spend a lot of time thinking about cameras. This summer, The Upshot conducted an analysis of every county in the country to determine which were the toughest places to live, based on an index of six factors including income, education and life expectancy. Afterward, we heard from Hal Varian, the chief economist at Google, who suggested looking at how web searches differ on either end of our index. The results, based on...