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Full-Text Articles in Economic Theory
Who Helps Tsimane Children And Adults?, Eric Schniter, Daniel K. Cummings, Paul L. Hooper, Jonathan Stieglitz, Benjamin C. Trumble, Hillard S. Kaplan, Michael D. Gurven
Who Helps Tsimane Children And Adults?, Eric Schniter, Daniel K. Cummings, Paul L. Hooper, Jonathan Stieglitz, Benjamin C. Trumble, Hillard S. Kaplan, Michael D. Gurven
ESI Working Papers
We examine various forms of helping behavior among Tsimane Amerindians of Bolivia, focusing on the provision of shelter, childcare, food, sickcare, cultural influence, and traditional story knowledge. Kin selection theory traditionally explains nepotistic nurturing of youth by closely related kin. However, less attention has been given to understanding the help provided by individuals without close genetic relatedness. To explain who provides various forms of help, we evaluate support for several predictions derived from kin selection theory. Our results show that helpers who are most often closely related and from an older generation tend to provide more costly forms of help …
Increases In Regional Brain Volume Across Two Native South American Male Populations, Nikhil N. Chaudhari, Phoebe E. Imms, Nathan F. Chowdhury, Margaret Gatz, Benjamin Trumble, Wendy J. Mack, E. Meng Law, M. Linda Sutherland, James D. Sutherland, Christopher J. Rowan, L. Samuel Wann, Adel H. Allam, Randall C. Thompson, David E. Michalik, Michael I. Miyamoto, Guido Lombardi, Daniel Cummings, Edmond Seabright, Sarah Alami, Angela R. Garcia, Daniel E. Rodriguez, Raul Quispe Gutierrez, Adrian J. Copajira, Paul L. Hooper, Kenneth Buetow, Jonathan Stieglitz, Michael D. Gurven, Gregory S. Thomas, Hillard Kaplan, Caleb E. Finch, Andrei Irimia
Increases In Regional Brain Volume Across Two Native South American Male Populations, Nikhil N. Chaudhari, Phoebe E. Imms, Nathan F. Chowdhury, Margaret Gatz, Benjamin Trumble, Wendy J. Mack, E. Meng Law, M. Linda Sutherland, James D. Sutherland, Christopher J. Rowan, L. Samuel Wann, Adel H. Allam, Randall C. Thompson, David E. Michalik, Michael I. Miyamoto, Guido Lombardi, Daniel Cummings, Edmond Seabright, Sarah Alami, Angela R. Garcia, Daniel E. Rodriguez, Raul Quispe Gutierrez, Adrian J. Copajira, Paul L. Hooper, Kenneth Buetow, Jonathan Stieglitz, Michael D. Gurven, Gregory S. Thomas, Hillard Kaplan, Caleb E. Finch, Andrei Irimia
ESI Publications
Industrialized environments, despite benefits such as higher levels of formal education and lower rates of infections, can also have pernicious impacts upon brain atrophy. Partly for this reason, comparing age-related brain volume trajectories between industrialized and non-industrialized populations can help to suggest lifestyle correlates of brain health. The Tsimane, indigenous to the Bolivian Amazon, derive their subsistence from foraging and horticulture and are physically active. The Moseten, a mixed-ethnicity farming population, are physically active but less than the Tsimane. Within both populations (N = 1024; age range = 46–83), we calculated regional brain volumes from computed tomography and compared …