Are Americans getting healthier?

Americans might be getting healthier, a development that—if true—could have economic causes and consequences. The percentage of Americans who are obese declined from 2010 to 2011, according to a Gallup report released this week. The year-over-year decrease is "statistically significant," said Gallup's Elizabeth Mendes. A professor in epidemiology and medicine at the University of Iowa's College of Public Health, says "economics is driving this."