Cultural and trade practices in Sincu Bara (Senegal): a multi-proxy investigation

The Sincu Bara site in Senegal is one of the most famous archeological sites in Western Africa. Here we present the results of a multi-proxy study that combined microscopic analyses, carbon content, stable carbon isotope (δ¹³C) and radiocarbon (¹⁴C) measurements. This investigation exhibits a chronological framework in two phases: from 400 yr AD to 650 yr AD and 650 yr AD to 900 yr AD. Furthermore, it shows that besides basic potteries, some potsherds are notable for a temper exclusively made with human-harvested C4 plants. Finally, the ¹⁴C analysis performed on the organic slip strongly indicates the use of bitumen or bitumen-derived products for red slip preparation. This suggests the establishment of trade relationships with Nigerian and/or Trans-Saharan populations as early as 400 yr AD.     

The Implications of Immigration Federalism for Non-citizens’ Rights and Immigration Opportunities: Canada and Australia Compared

This article explores the development of immigration federalism in Australia and Canada (expressed through the establishment of state/provincial/territorial immigrant selection programs) and its implications for immigrants’ rights and immigration opportunities. Given the very limited scholarship on the issue, and the lack of previous comparative studies on immigration federalism in Australia and Canada, our research is exploratory by nature. Our finding is that provincial/state/territorial programs offer some advantages to prospective applicants (such as increased immigration opportunities), but, at the same time, raise a number of concerns (such as an increased dependence on employers). As our study reveals, the costs and benefits of immigration opportunities under state/provincial/territorial programs differ for skilled and low-skilled workers, whereby the latter are given only limited access to permanent residence, and on more onerous conditions than skilled workers. Drawing on these findings, we identify areas in need of further research and policy response.