The life cycle of bronze age metalwork from the Thames

The high proportion of Bronze Age metalwork found in the Thames has aroused interest for many years, but all too little is known of the circumstances in which this material was deposited. Much of it is weaponry, but there are finds of tools as well. This paper examines the material found upstream of Teddington and considers its treatment before it entered the river. A high proportion of the artefacts had been used and some of them deliberately destroyed. There are marked variations in the selection and treatment of these artefacts along different lengths of the river and in different periods of the Bronze Age, but it seems likely that the proportion of fine metalwork that was deliberately damaged before it entered the river increased sharply over time.     

Online petitions in Australia: Information,opportunity and gender

This article compares offline and online petition signing in Australia, to examine whether online forms of political activity can mobilise citizens who would otherwise not participate. Using data from the 2010 Australian Election Study and a model of civic voluntarism comprising online and offline resources, the article presents several unexpected findings. First, women are significantly more likely than men to sign both written and e-petitions, and this will likely continue with the increasing circulation of e-petitions and corresponding decline in written petitions. Second, Australians from a non-English-speaking background are underrepresented in the signing of written petitions but not of e-petitions. Civic skills gained in the workplace and voluntary organisations positively predict both forms of petition signing, but language, gender and income do not constitute barriers to the signing of e-petitions. This article contributes to emerging evidence the internet can mobilise traditionally underrepresented groups to participate in political activity.

本文对澳大利亚脱线和在线请愿做了比较,以了解在线的政治活动能否动员起本来不参与政治的公民。笔者使用了2010年澳大利亚选举研究的数据以及比较在线与脱线资源的公民志愿行动模型,获得了若干意想不到的发现。首先,比起男子,妇女联署纸本及电子请愿书的可能性会大得多,这种情况会伴随着电子请愿的流行和纸本请愿的式微而继续下去。公民在工作单位以及志愿者组织那里获得的技能有助于他们积极参与两种请愿,而语言、性别、收入也不构成电子请愿的障碍。本文印证了互联网可以动员以往不大被代表的人群参与政治活动的说法。     

THE IMPACT OF RENT CONTROLS IN NON-WALRASIAN MARKETS: AN AGENT-BASED MODELING APPROACH

ABSTRACT.  We use agent-based models to consider rent ceilings in non-Walrasian housing markets, where bargaining between landlord and tenant leads to exchange at a range of prices. In the non-Walrasian setting agents who would be extramarginal in the Walrasian setting frequently are successful in renting, and actually account for a significant share of the units rented. This has several implications. First, rent ceilings above the Walrasian equilibrium price (WEP) can affect the market outcome. Second, rent ceilings that reduce the number of units rented do not necessarily reduce total market surplus. Finally, the distributional impact of rent controls differs from the Walrasian setting.     

Gravity Parameter Estimation

The question of whether ordinary least-squares (OLS) regression provides unbiased estimates for parameters of the gravity model is investigated. Holding attractiveness constant and looking only at the location of destinations, OLS is shown to give unbiased estimates if underlying behavior conforms to the gravity hypothesis. Johnston's conjectures on this are examined and found to explain only partially observed variations in distance exponents. Allowing attractiveness to vary, spatial autocorrelation in attractiveness is shown to lead to bias in OLS estimation due to misspecification, even where behavior conforms to the gravity hypothesis. Deterministic and stochastic illustrations are provided.     

Theoretical Underpinnings of the Gravity Hypothesis

Various theoretical rationalizations of the gravity hypothesis for spatial interaction are examined. Deterministic utility theory cannot account for variability in individual behavior. Choice models based on Luce's axiom contain some inconsistencies. Random utility theory provides a probabilistic formulation that is internally consistent, and also solves the aggregation problem. However, investigation reveals that, although this provides a theoretical justification for gravity-like behavior, the assumptions made are sufficiently unrealistic to cast doubt on the empirical validity of the gravity hypothesis.     

Characterization of New Zealand obsidian using PXRF

New Zealand has some of the most active areas of rhyolitic volcanism in the world and this has produced numerous obsidian sources in the northern half of the North Island. In total archaeologists have recognized 27 named locations from which obsidian can be obtained scattered across 4 geological source regions. Shortly after colonization in the late 13th century AD Polynesian settlers began transporting this material some thousands of kilometers throughout the country and across the sea in small quantities to distant neighbors in the Kermadecs and Chatham islands. Although considerable research has been conducted on obsidian sourcing in New Zealand the complexity of geochemical source discrimination and the lack of a practical method of non-destructive geochemical analysis has hindered progress. We present the results of our use of PXRF to provide geochemical data on New Zealand obsidian sources and to compare the use of discriminant analysis and classification tree analysis to discriminate among sources and attribute archaeological samples to sources. Our research suggests that classification tree analysis is superior to discriminant analysis in sourcing studies. A large case study using an important settlement phase site (S11/20) from the Auckland region demonstrates the utility of the methods and the results support a model of high degrees of mobility and interaction during the early settlement of New Zealand.     

Class,capital, and identity in Australian society

Despite a comparatively ‘flat’ social structure and lack of obvious class-based cleavages, Australian society is stratified by objective, multidimensional measures of social class. Using data from a July 2015 survey of a random sample of Australian citizens, latent class analysis identifies six class types in Australian society, based on the distributions of cultural, social, and economic capital among respondents. The resulting classes are categorised as ‘precariat’, ‘ageing workers’, ‘new workers’, ‘mobile middle’, ‘emerging affluent’, and ‘established affluent’. The precariat is characterised by high numbers of retired pensioners, the ageing worker class the highest mean age, and the new worker class by its low rate of unemployment. The established middle class accounts for one quarter of the adult population, while the emergent affluent class has the youngest mean age, and the established affluent is the most advantaged. We also show Australians are acutely aware of their class identity.