For example, estimates of Pennsylvania job creation due to increased shale gas production since 2009 range from 44,000 to 72,000. In Bradford County, Pa., the 2009 unemployment rate of 10 percent has been halved because of Marcellus Shale gas development. New York’s economically depressed Southern Tier is also benefiting from gas field development in nearby Pennsylvania. Case in point: RB Robinson Contracting, Inc., a family construction business in Candor, N.Y., had eight full-time employees in 2009. Today, it provides full- and part-time work for 120 people.