Kramer, Karen (2008)
Early sexual maturity among Pumé foragers of Venezuela: Fitness implications of teen motherhood.
American Journal of Physical Anthropology. [pdf]

Kramer, Karen and Russell Greaves (2007)
Changing patterns of infant mortality and fertility among Pumé foragers and horticulturalists.
American Anthropologist 109 (4): 713-726. [pdf]

Kramer, Karen (2007)
Application of an integrated cooperation approach to human cooperative breeders.
Behavioural Processes 76:167-169. [pdf]

Kramer, Karen and Garnett McMillan (2006)
The effect of labor saving technology on longitudinal fertility changes.
Current Anthropology 47 (1):165-172. [pdf]

Kramer, Karen (2005)
Children’s help and the pace of reproduction: Cooperative breeding in humans.
Evolutionary Anthropology 14(6): 224-237. [pdf]

Kramer, Karen (2005)
Maya Children: Helpers at the Farm. Harvard University Press, Cambridge. [flier]

Kramer, Karen (2004)
Reconsidering the cost of childbearing: The timing of children’s helping behavior across the life cycle of Maya families. SocioEconomic Aspects of Human Behavioral Ecology, Research in Economic Anthropology, volume 23, edited
by Michael Alvard, pp 335-353. Elsevier, Amsterdam. [pdf]

Kramer, Karen and James Boone (2002)
Why intensive agriculturalists have higher fertility: A household labor budget approach to subsistence intensification and fertility rates. Current Anthropology 43(3):511-517. [pdf]

Lee, Ronald D. and Karen Kramer (2002)
Children’s economic roles in the Maya family life cycle: Cain, Caldwell and Chayanov revisited. Population and Development Review 28(3): 475-499. [pdf]

Kramer, Karen and Garnett P. McMillan (1999)
Women's labor, fertility and the introduction of modern technology in a rural Maya village. Journal of Anthropological Research 55(4): 499-520.

Kramer, Karen and Garnett P. McMillan (1998)
How Maya women respond to changing technology. The effect of helping behavior on initiating reproduction. Human Nature 9(2): 205-223. [pdf]