In the United States , the Office of Management and Budget -LRB- OMB -RRB- has produced a formal definition of metropolitan areas .
Metropolitan Statistical Areas -LRB- MSA -RRB- are large metropolitan areas of the United States as defined by the Office of Management and Budget .
Metropolitan Statistical Areas -LRB- MSA -RRB- are large metropolitan areas of the United States as defined by the Office of Management and Budget .
간단한 표현 사용: In the United States , the Office of Management and Budget -LRB- OMB -RRB- has produced a formal definition of metropolitan areas . 산출: