Many agribusinesses and food processors source raw materials from smallholder farmers. This is particularly true in certain sectors, such as coffee, cocoa and sugar. Over the past 20 years, there has been a shift towards more traceable supply chains. Rather than purchasing crops that have passed through several layers of collectors, firms are now sourcing directly from farmers or trusted aggregators. The drivers for this change include concerns about food safety, child labor and environmental sustainability as well as a desire to increase productivity and improve crop quality.