Early Paleoindian Mobility and Watercraft: An Assessment from the Mississippi River Valley

Several researchers have suggested use of watercraft during the Early Paleoindian period 11,500 and 10,800 rcybp (13,400–12,700 cal B.P.), but none have brought empirical data to bear on this possibility. This paper addresses the potential for fluted point-making groups to have made and used boats circa 11,000 rcybp (13,000–12,800 cal B.P.). Fluted point data from a large region of the upper and central Mississippi River valley strongly suggest that the Mississippi River was a barrier to movement and that Early Paleoindians in the midcontinent did not routinely use watercraft.     

Big City Labor Markets and Immigrant Economic Performance

Franklin J. James spent much of his career working to understand and improve our metropolitan communities. His interests were varied, ranging from impacts of fiscal and economic distress on urban areas to understanding socioeconomic forces reviving our central cities. During the last several years, Professor James had turned his attention to examining the positive economic impacts immigrants and ethnic communities have for reinvigorating our central cities-and beginning to investigate how non-native American's will impact America's suburbs in metropolitan settings
This preliminary exploration examines destination choices of immigrants, the characteristics of immigrant labor markets, and the determinants of immigrant earnings. The article begins to explore indirect evidence on the economic efficiency with which immigrants and native workers distribute themselves within and among labor markets as well as the assimilation process facing new immigrants. Evidence is presented to explain how the earnings of recent immigrants are affected by their human capital characteristics, their race, and ethnicity, and other factors. We reject the hypothesis that immigrants participate in a tertiary sector of urban labor markets and conclude that the determinants of immigrant earnings are similar enough to those of U.S. natives that it makes sense to assume that they work in the same primary labor market in which most native White Americans work. We find that urban labor markets for immigrants are surprisingly efficient, thus enabling immigrants to take advantage of economic opportunities. A major exception concerns what appears to be a powerful effect of discrimination on the economic progress of Black immigrants.     

Pre-Clovis in Texas? A critical assessment of the “Buttermilk Creek Complex”

Lithic artifacts from the lowest strata of the Debra L. Friedkin site, located on Buttermilk Creek in central Texas, have been interpreted as an undisturbed pre-Clovis assemblage (Waters et al., 2011a). Stone tools and debitage were recovered from sediments stratified just below diagnostic Clovis artifacts and dated by OSL to between 13.2 and >15.5 cal kya. Invoking commonly observed cultural and natural site formation processes, we offer an alternative explanation of the “Buttermilk Creek Complex” as a Clovis assemblage in secondary association with the dated sediments.