Figure 3.5: Nonresponse has been increasingly steadily, even in high-quality expensive surveys(National Research Council 2013; B. D. Meyer, Mok, and Sullivan 2015).
Twelve months later, a follow-up survey(with no Nonresponse) showed that in both the treatment and control groups, 70%
of the students had secured full-time employment in their chosen field(table 4.6).