This study documents for 1994-2014 the global use of improved wheat germplasm and the economic benefits from international collaboration in wheat improvement research funded by CGIAR and involving national agricultural research systems, CGIAR organizations, and advanced research institutes. Conducted by the CGIAR Research Program on Wheat (WHEAT), this is the fourth in a series of global wheat impact assessments (Byerlee and Moya 1993; Heisey et al. 2002; Lantican et al. 2005) initiated by the International Maize and Wheat Improvement Center (CIMMYT). It updates data and earlier analyses from the most recent, previous study, covering 1988-2002 (Lantican et al. 2005).