Farmers around the world rely on IPM practices in order to increase their yields and reduce their losses due to pests. This thesis summarizes previous IPM CRSP impact studies, and provides additional impact assessments of IPM practices developed on the program. Scientist-questionnaires were sent to scientists in each IPM CRSP site around the world. Using the data from the questionnaire responses in combination with additional secondary information on elasticities, prices and quantities, economic surplus analyses were conducted. This document contains several case studies from around the world, highlighting successes and areas for improvement.