Multi-mode surveys can enhance the representativeness of respondents by reducing coverage and non-response errors, and by increasing response rates and the overall number of respondents (Dillman et al., 2009: 302-304; Weisberg 2005: 278-296)—particularly since the causes of unit non-response and, consequently, respondents’ profiles vary across modes (Groves et al., 2002).  Multi-mode surverys are increasingly the standard practice among researchers (Biemer and Lyberg, 2003). However, they impose additional costs and administrative burdens (Dillman et al., 2009: 301).  But how much does the use of multiple modes of contact improve the representativeness of respondents relative to the sample?  Does this improvement, if any, come at an acceptable cost?  We analyze the effects of using three modes of contact sequentially in a survey of recent graduates of University of California, Riverside, and assess the fieldwork costs associated with the use of multiple contact modes.