On the urns of a dilemma: radiocarbon and the Peterborough problem

Radiocarbon dates are presented for distinctive types of British Late Neolithic pottery, identifying questions which cannot yet be resolved.     

STATISTICAL PROPERTIES OF MATHEMATICAL PROGRAMMING MODELS OF STOCHASTIC NETWORK EQUILIBRIUM*

ABSTRACT. Boyce et al. (1981, 1983) have proposed and implementd the use of observed entropy levels to estimate the travel-cost coefficient in mathematical programming models of network equilibrium which involve logit route-choice probabilities. This so-called “dispersion-constrained” model is shown to give severely biased and statistically inefficient underestimates. A natural counterpart, the entropy-maximizing model, is proposed here and overestimates the travel-cost coefficient with much lower bias and much higher statistical efficiency. Even though the two models are mathematically homeomorphic in some respects, they have vastly different statistical properties. It follows that the use of observed entropy levels is undesirable and should be avoided, since maximizing entropy provides an unambiguously superior alternative.     

Governed by Experience: Political Careers and Party Loyalty in the Senate

In this article, we study the U.S. Senate to understand how legislators' previous experiences in elected office influence their political behavior. We posit that, as a result of their experiences in office, former governors in the Senate are less partisan than their colleagues. We code the political jobs held by senators between 1983 and 2015 and analyze the effects of these careers on party loyalty in Senate floor votes. We find that gubernatorial service is associated with a 7–8% decrease in Party Unity. We test several hypotheses for the observed “governor effect” and find that, relative to their colleagues, former governors are supported by donor networks that are less ideologically extreme. We conclude that the unique experiences associated with serving as governor, along with the personalized nature of governors' electoral support coalitions, affect a senator's relationship with the party. Ultimately, our analysis illuminates how personal attributes, such as prior experience in elected office, can inform the study of legislative behavior.     

Iron Age Burial in Wales: Patterns,Practices and Problems

Until the latter part of the twentieth century, Iron Age burial in Britain was thought to be largely archaeologically invisible. However, over the last 40 years the recovery of large assemblages of human remains, often from pits and ditches rather than beneath monumental structures, has changed our understanding of Iron Age funerary practices. The problem, though, is that the majority of this material derives from core areas of study, particularly southern England and Yorkshire. Our knowledge of burial in the more peripheral areas of Britain, such as Wales, is much more poorly understood. The perceived paucity of burials from such regions is often still interpreted as resulting from the practice of archaeologically invisible disposal methods such as excarnation or the scattering of cremated remains. This paper presents a comprehensive review and analysis of Iron Age human remains in Wales. Although the resource for study is relatively small, a variety of practices, disposal methods and treatments of bodies can be recognized which challenge our current narratives. The scarcity of burials when compared to other parts of Britain, such as Wessex, is suggested to be a result of both poor preservation and bias in archaeological research strategies, rather than the dominance of an ‘invisible’ burial rite.     

Approach to Trading Off Economic and Environmental Values in Industrial Land-Use Planning

Few contemporary issues have received as much sustained attention as the deterioration of the quality of our natural environment and, particularly, the need to manage the trade-off between economic growth and the quality of that environment. This paper discusses research currently under way to develop a land-use planning methodology that will help planners address the trade-offs between environmental quality and economic development. The methodology is used to evaluate the social, economic, and environmental impact of alternative land-use plans. The methodology consists of a regional analysis submodel and a site analysis submodel. The first component is based on an expanded input-output analysis incorporating land use, resource inputs, and waste-emission outputs. The second component is an empirical analysis based on the specific suitability and compatibility of proposed land-use development packages. The land-use planning model developed is applied to a case-study area centered on Charleston, South Carolina.