In the same vein, a 2014 survey by the Federal Reserve Bank of Boston found that roughly 44 percent of its survey’s respondents participated in some informal paid work activity during the previous two years. See Bracha and Burke (2014). 5 See Katz and Krueger (2016). 6 See Harris and Krueger (2015).
7 By contrast, studies conducted by the Federal Reserve Bank of Boston in 2013 and 2015 found that  approximately one in four respondents—or more than half of informal work participants—say they earned money through informal work activities conducted online. See Bracha, Burke, and Khachiyan (2015). 8 See Robles and McGee (2016).