“…Economists have utilized SFA techniques to examine the efficiency of profit-maximizing firms in a variety of industries such as agriculture (e.g., Battese and Coelli 1995), manufacturing (e.g., Bottasso and Sembenelli 2004;Schank 2005), health care (e.g., Jacobs 2001; Li and Rosenman 2001), sports (e.g., Hofler and Payne 1997;Kahane 2005), and banking (e.g., Clark and Siems 2002). Researchers have also used SFA techniques to analyze efficiency among nonprofit firms such as museums (e.g., Bishop and Brand 2003) and libraries (e.g., Hemmeter 2006). Labor economists (e.g., Hofler and Polacheck 1985;Lang 2005) have utilized SFA techniques to examine potential wages or the earnings frontier.…”