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I am an evolutionary social scientist interested in how humans respond adaptively to culturally structured social worlds.

Two main foci of my research are:

1. How do people think about ethnic boundaries? I use cross-cultural and developmental research to examine whether humans cognition is shaped by a history of ethno-linguistic landscapes and how the entailments of these boundaries vary. My primary geographic focus has been among agro-pastoralists in the Peruvian Altiplano along the Quechua-Aymara linguistic border

2. How do our social networks influence reproduction? I examine why and how family members and religiosity affect fertility outcomes across space and time. I also work on why social learning processes influence reproductive decision-making so much and how this can give rise to puzzling phenomena such as the demographic transition, below replacement fertility, and cross-site variation in life history decisions.

I am also starting projects on the origins of ritual participation at a new pilgrimage site, and inter-site variation in collective action on vicuña hunts, both in the Peruvian Altiplano.

See list of publications on Google Scholar or on my personal website


PhD Anthropology, University of California, Los Angeles

BA Anthropology & Psychology, University of California, Berkeley


Co-instructor - Social Psychology