The Bureau of Mines determined costs associated with the production of tin from 18 market economy countries (mec's). The resource and relative economic positions of 146 tin deposits were evaluated. Demonstrated resources of recoverable tin metal are estimated to be 2.8 million mt. Over 70 pct of this material is recoverable from three southeast Asian countries-Malaysia, Thailand, and Indonesia; all are members of the International Tin Agreement (ITA). In the last 5 yr, Brazil has become a major, low-cost tin producer. In light of its large resources, Brazil has become a dominant mec tin producer and one of the world's few tin producers that can prosper during a protracted period of low tin prices.