To provide improved methods to assess the impact of introduction and use of technology resulting from USAID
investments in agricultural research, a suite of integrated interactive models was created for use in developing
countries. Economic, environmental, and biophysical models were developed to provide a holistic evaluation of
the impact of new technology or policy options. Studies were conducted in East and West Africa. In this case
study, the impact in Mali of the introduction of shorter season higher yielding sorghum varieties, ridge tilling for
water retention, and enhanced use of inputs was estimated. Experimental data from INTSORMIL CRSP and
ICRISAT, involving national research and extension partners and farmers¿ trials, provided estimates of costs of
production and yields for both the current and new production systems.