I am broadly interested in how our decisions are affected by the environment in which they are made. How do power, competition and social challenge interact with individual differences in testosterone to guide behavior in bargaining contexts and risk-taking? How is self-control affected by competition and what role do fluctuations in testosterone play in this relationship? How is decision-making affected by stress and changes in cortisol? What are the neural underpinnings of decision-making and emotion regulation? My research examines the interplay between social contexts and biology in shaping decisions and behaviors.