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Chinese history (Tang, Song, Liao dynasties), global middle ages, sino-steppe relations, aristocracies, meritocracy, elites, political culture, death ritual, premodern cities, premodern empires, imperialism, ethnicity, nationalism, national identity, social networks, frontiers, boundaries and borderlands, digital methodologies

sociology, trust, social media, social psychology, misinformation, disinformation, social networks, collective action, social exchange, information exchange, social incentives, reputation, internet research, online research, online behavior, human-computer interaction, data science, biosensors, virtual reality