 This paper compares the impact of climate change on agriculture using process-based, statistical, and integrated assessment models, finding that the inter-method comparison reveals significant differences in yield impacts, with indirect climate effects adjusting yields by between minus 12% and plus 15%, while input substitution and crop switching account for the remaining effects. The IMS generate higher yield impacts than process-based or statistical crop models, with a range of 20% to 40%. This article was authored by Kate Calvin and Karen Fischer-Vander.