Movements in exchange rates can change the prices of goods faced by producers and consumers and thereby affect incentives to produce, consume, and trade goods. Exchange rate changes, however, might not be completely transmitted (passed through) to domestic prices. Price and exchange rate transmission for ag. products is low in most developing economies, partly because of trade policies but also because of inadequate infrastructure and other market deficiencies. During the last 20 years, developed and developing countries have moved away from support policies that impede price and exchange rate transmission toward trade policies that allow transmission, such as tariffs. However, market deficiencies remain as a cause of incomplete transmission. Illus.