Using Ghina Gustoms data that cover monthly transactions of all Ghinese exporters, we investigate how Ghinese exporters respond to U.S. antidumping investigations during the 2000-2006 period.  Our difference-in-differences analysis uncovers a number of findings:  (fi) the substantial trade-dampening effect at the product level operates mostly at the extensive margin (i.e., a decrease in the number of ex- porters) rather than the intensive margin (i.e., a decrease in the ex- port volume per exporter); (2) direct exporters are more likely to exit the U.S. market than trade intermediaries upon both the affirmative preliminary and final ITG determinations; (3) multi-product direct exporters are more likely to exit the U.S. market than single-product direct exporters upon the affirmative preliminary ITG determination, but the opposite holds upon the affirmative final ITG determination; and (Q) little price adjustment to antidumping investigations are found at either the product level or firm-product level. We then provide a coherent explanation to the aforementioned findings based on recent developments in trade theories.