Read the Economics of Genetically Engineered Crops in Agriculture: Issues for Consideration white paper.
The information presented in this paper addresses questions about the economic and market effects of genetically engineered crops. Unless indicated otherwise the information is based primarily on the U.S. experience with soybeans, corn and cotton during the last 15 to 18 years since these crops have been introduced and expanded. Given this relatively short period of time, some aspects of the long-term economic effects of these crops cannot be assessed based on available evidence. This caveat is relevant in particular to the effects of herbicide resistant weeds on farm-level costs and net benefits.