%0 Journal Article %T Are Social Networks a Double %A Christine Chmura %A Xiaobing Shuai %J Economic Development Quarterly %@ 1552-3543 %D 2018 %R 10.1177/0891242418785458 %X Utilizing a survey of defense contractors in the New England region, this study explores the effect of social networks on business performance¡ªmeasured by annual employment growth and market diversification¡ªduring a time when defense spending in the United States was contracting. In contrast to prevailing literature focusing on entrepreneurial firms, this study offers insights on how social networks function in defense contractors, which tend to be mature firms. The main conclusion is that having more network connections is associated with faster short-term employment growth (from 2014 to 2015) for defense contractors, but there is a limit to that benefit. The analysis also shows that social networks do not aid market diversification for defense contractors. This poses an interesting challenge for defense contractors, as they need to balance the priorities of short-term growth and long-term success %K social network %K business performance %K employment growth %K market diversification %U https://journals.sagepub.com/doi/full/10.1177/0891242418785458