06 BST Click to followThe Independent US Skid Row in downtown Los Angeles. Skid Row has LA's largest concentration of homeless people who regularly camp on the sidewalks in tents and cardboard boxes Getty Images America is regressing to have the economic and political structure of a developing nation, an MIT economist has warned.Peter Temin saysthe world's largest economyhas roads and bridges that look more like those in Thailand and Venezuela than those in parts of Europe.In his new book, The Vanishing Middle
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