Each country sets their own standards for acceptable pesticide maximum residue limits, with some countries imposing harsher standards than others do. Taxes and governmental red tape only further compound the issues, often leading to protectionism in agricultural trade. Using data from the USDA Foreign Agricultural Service a protectionism index has been developed for more than 80 countries.
Beghin, John C.
"The Protectionism of Food Safety Standards in International Agricultural Trade,"
Agricultural Policy Review: Vol. 2014
, Article 5.
Available at: http://lib.dr.iastate.edu/agpolicyreview/vol2014/iss1/5