Max Price

Is poverty in our genes? A critique of Ashraf and Galor, "The 'out of Africa' hypothesis, human genetic diversity, and comparative economic development," American Economic Review (Forthcoming)

We present a critique of a paper written by two economists, Quamrul Ashraf and Oded Galor, which is forthcoming in the American Economic Review and which was uncritically highlighted in Science magazine. Their paper claims there is a causal effect of genetic diversity on economic success, positing that too much or too little genetic diversity constrains development. In particular, they argue that “the high degree of diversity among African populations and the low degree of diversity among Native American populations have been a detrimental force in the development of these regions.” We demonstrate that their argument is seriously flawed on both factual and methodological grounds. As economists and other social scientists begin exploring newly available genetic data, it is crucial to remember that nonexperts broadcasting bold claims on the basis of weak data and methods can have profoundly detrimental social and political effects.

Confidence Intervals in the Analysis of Mortality and Survivorship Curves in Zooarchaeology

Abstract The analysis of age-at-death data, derived from epiphyseal fusion and dental eruption/wear patterns, is one of the most powerful tools at the disposal of zooarchaeologists studying past hunting and herd management practices. Zooarchaeologists typically analyze age-at-death data by constructing survivorship and mortality curves in order to allow insight into a variety of ecological and economic relationships between humans and animals. Since adopting such practices in the middle of the twentieth century, zooarchaeologists have proposed several methods for analyzing these curves, including visual examination and hypothesis testing. Creating confidence intervals is complementary to these two methods, allowing practitioners to graphically represent survivorship and mortality while testing hypotheses and accounting for sample sizes, which are often small in zooarchaeological assemblages. We discuss the basic concepts behind the nature of age-at-death data and the analysis of mortality and survivorship curves. We then describe how to calculate confidence intervals using bootstrapping techniques for both dental eruption/wear data and epiphyseal fusion data. To enable future users to replicate our methods, we introduce the freely available online R package “zooaRch” (http://cran.r-project.org/web/packages/zooaRch/ ), which includes a vignette to guide first-time users.

Gazelles, Liminality, and Chalcolithic Ritual: A Case Study from Marj Rabba, Israel

Endangered today, gazelles were both economically and symbolically important to the peoples of the ancient Near East. In various contexts, the gazelle has represented liminality, death, and rebirth. Gazelles held special significance in the southern Levant, where archaeologists have documented cases, spanning 20,000 years, of ritual behavior involving gazelle body parts. What roles did gazelles play during the Chalcolithic (ca. 4500–3600 B.C.), a period of both decreased hunting and ritual intensification? In this article, we discuss a unique find of burned gazelle feet at the site of Marj Rabba (northern Israel). The feet were found within a well-constructed building that was used for rituals and included two articulated human feet. The gazelle foot bones, the majority of which derive from adult male mountain gazelles (Gazella gazella), appear to reflect the remains of intentionally destroyed skins or severed limbs. This unique find highlights the evolving symbolic importance of gazelles, perhaps as forces of liminality, in Chalcolithic rituals.