This paper presents an analysis of two important decisions of the anti-dumping Tribunal concerning the importation of hydraulic turbines from the USSR and hydro-electric generators from Japan. This study attempts to determine the social cost that anti-dumping measured would have imposed on the country had they been in effect during the period 1971-1979. I conclude, had anti-dumping measures been in effect would have caused a substantial excess burden because buyers would have been forced to pay much higher prices for imports. The benefits would have gone to foreign suppliers. Import-competing domestic producers would have gained little or nothing.