The study looked at how contracts between tomato growers and processors affect tomato production in California. They analyzed data from 51 processors and found that incentives in contracts have a big impact on how well tomatoes are grown. Different types of incentives work together to improve production outcomes. Even after considering many other factors, there is still a lot of variation in production that can't be explained. Overall, the study shows that the incentives in contracts play a significant role in tomato production.