 According to "The Economist", the meta-analysis considered all published English-language examinations of the agronomic and economic impacts between 1995 and March 2014.The study found that herbicide-tolerant crops have lower production costs, while for insect-resistant crops the reduced pesticide use was offset by higher seed prices, leaving overall production costs about the same.Yields increased 9% for herbicide tolerance and 25% for insect resistance.