This study takes an economic approach in examining the practice of human sacrifice as it relates to notions of the economic value of human life. Codes are included.

This article suggests that the relationship of monogamy and independent families to societal complexity is best represented by a curvilinear rather than a linear model. Though the variance explained in this relationship is low, it is somewhat increased when variables are scored as dummy variables rather than ordinal.

This article posits a theory of social evolution based on agriculture. The author suggests that a society’s energy source, type of tool materials, and systems of agriculture constitute a variable cluster, and that they are associated with societal scale, economic differentiation, and mode of political integration. Empirical analysis supports this neoevolutionary theory of agriculture.