This research examines the extent to which the email medium exacerbates the aggressiveness of opening offers made by negotiators from two distinct cultures. Hypotheses derived from negotiation, communication, and culture research predict that Hong Kong Chinese negotiators using email would exhibit a reactance effect and consequently engage in more aggressive opening offers and claim higher distributive outcomes than similar negotiators in the United States. Study 1 examines intercultural email negotiations and results indicate that Hong Kong Chinese negotiators made more aggressive opening offers and attained higher distributive outcomes than their U.S. counterparts. Study 2 results replicate Study 1 findings in an intracultural negotiation setting and also show favorable outcomes for Hong Kong email negotiators when compared to both Hong Kong and U.S. face-to-face negotiators. Overall, the findings suggest that Hong Kong Chinese and U.S. negotiators vary substantially in how they negotiate via email and face to face, which results in differences in distributive outcomes. © The Author(s) 2012.