I study the ethics and regulation of artificial intelligence, with a focus on privacy. My dissertation examines privacy in three contexts shaped by artificial intelligence. Chapter 1 describes privacy in healthcare contexts, as hospitals and nursing homes use computer vision to monitor patients. Chapter 2 examines privacy in market contexts, as big companies collect consumer data and begin to nudge consumer behavior. Chapter 3 examines privacy in government contexts, as government agencies like Customs and Border Protection begin to adopt facial recognition and other algorithmic tools. Overall, my research aims to help policymakers as they grapple with the social impacts of artificial intelligence.