Today’s news that unemployment dropped from 10.2% to 10% indicates that the deepest recession since the 1930s may be over, says the head of the government agency responsible for officially calling recessions. “Today’s report makes it seem that the trough in employment will be around this month,” said Robert Hall, head of the National Bureau of Economic Research’s Business Cycle Dating Committee. “The trough in output was probably sometime in the summer. The committee will need to balance the midyear date for output against the end-of-year date for employment.”