Agricultural Research Impact Assessment: The Case of Maize Technology Adoption in Southern Mali
According to the authors, adoption of the improved maize package was particularly rapid during the period 1980-86 when an attractive guaranteed price was offered and extension activities were reinforced by a maize project that included the establishment of a seed multiplication program.
Link
http://agecon.lib.umn.edu/cgi-bin/pdf_view.pl?paperid=7386&ftype=.pdf