Yalcin Dogan, social engineer at Social Tables Inc., works in the engineering room at the Social Tables Inc. headquarters in Washington, D.C., U.S., on Thursday, Aug. 14, 2014. Success stories like Social Tables’ are going to get rarer as older businesses overshadow start-ups in U.S. job creation. Millennials, those born after 1980, may find it more difficult to quickly scale career ladders as new businesses, which tend to employ more young workers, become a smaller force in the labor market. Photographer: Andrew Harrer/Bloomberg *** Local Caption *** Yalcin Dogan