Population Synthesis: Comparing the Major Techniques Using a Small, Complete Population of Firms

Recently, disaggregate modeling efforts that rely on microdata have received wide attention by scholars and practitioners. Synthetic population techniques have been devised and are used as a viable alternative to the collection of microdata that normally are inaccessible because of confidentiality concerns or incomplete because of high acquisition costs. The two most widely discussed synthetic techniques are the synthetic reconstruction method (IPFSR), which makes use of iterative proportional fitting (IPF) techniques, and the combinatorial optimization (CO) method. Both methods are described in this article and then evaluated in terms of their ability to recreate a known population of firms, using limited data extracted from the parent population of the firms. Testing a synthetic population against a known population is seldom done, because obtaining an entire population usually is too difficult. The case presented here uses a small, complete population of firms for the City of Hamilton, Ontario, for the year 1990; firm attributes compiled are number of employees, 3-digit standard industrial classification, and geographic location. Results are summarized for experiments based upon various combinations of sample size and tabulation detail designed to maximize the accuracy of resulting synthetic populations while holding input data costs to a minimum. The output from both methods indicates that increases in sample size and tabulation detail result in higher quality synthetic populations, although the quality of the generated population is more sensitive to increases in tabular detail. Finally, most tests conducted with the created synthetic populations suggest that the CO method is superior to the IPFSR method.     

Composite hunting technologies from the Terminal Pleistocene and Early Holocene,Niah Cave,Borneo

Renewed archaeological investigation of the West Mouth of Niah Cave, Borneo has demonstrated that even within lowland equatorial environments depositional conditions do exist where organic remains of late glacial and early post-glacial age can be preserved. Excavations by the Niah Cave Research Project (NCP) (2000–2003) towards the rear of the archaeological reserve produced several bone points and worked stingray spines, which exhibit evidence of hafting mastic and fibrous binding still adhering to their shafts. The position of both gives strong indication of how these cartilaginous points were hafted and gives insight into their potential function. These artefacts were recovered from secure and ¹⁴C dated stratigraphic horizons. The results of this study have implications for our understanding the function of the Terminal Pleistocene and Early Holocene bone tools recovered from other regions of Island Southeast Asia. They demonstrate that by the end the Pleistocene rainforest foragers in Borneo were producing composite technologies that probably included fishing leisters and potentially the bow and arrow.     

The mosque in the suburbs: Negotiating religion and ethnicity in South London

The geography of religi on for UK residents of South Asian origin is inexorably linked to the politics of the built environment. In particular, the siting, or expansion, of places of worship for minority-religious groups has often been bound up with the negotiation and contestation of the politics of identity. In this paper we explore the historical unfolding of a complex politics of identity and difference across one particular site of religious worship. The building in question is the London Fazl Mosque, London's first mosque. The paper focuses on two periods in the architectural, social and religious life of the site: its initial planning, opening and use in the London suburbs of the 1920s; and the community's more recent--and ultimately unsuccessful--attempts to extend the mosque in the 1990s. Across these two periods we draw out the ways in which notions of similarity and difference were employed by mosque-users, other local residents, the press and local and central government bodies in their discourse relating to the mosque. In particular we are concerned with how the mosque has meant different things to different religious, ethnic and social groups across the period under study, and how the mosque's relative ability to conform to associative aesthetic valuations throughout its history effectively sanctioned as well as condemned building works. Pour les résidents du Royaume-Uni d'origine sudasiatique, la géographie de la religion est inexorablement liée à l'environnement architectural. En particulier, le choix de sites ou l'expansion de lieux de culte pour les groupes religieux minoritaires ont souvent été reliés à des débats identitaires. Dans cet article, nous explorons l'évolution historique d'un jeu complexe de politiques de l'identité et de la différence par le biais d'un édifice religieux. Le site en question est la mosquée Fazl, la première ayant été bâtie à Londres. L'article se concentre sur deux périodes de la vie architecturale, sociale et religieuse de ce site: sa planification initiale, son ouverture, et son utilisation dans la banlieue de Londres pendant les années 1920, ainsi que les efforts plus récents--éventuellement sans succès--d'agrandir la mosquée pendant les années 1990. À travers ces deux périodes, nous exposons comment des notions de similaritéet de différence ont été mises de l'avant par les usagers du lieu, les autres résidents du quartier, la presse et les institutions gouvernementales centrales et locales dans leurs discours respectifs sur la mosquée. Nous cherchons en particulier à dégager comment la mosquée acquière une signification différente selon chaque religion, ethnie ou groupe social impliqué pendant la période sous étude. Nous cherchons aussi à dégager comment la capacité relative de la mosquée à se conformer à des valeurs esthé tiques associatives au cours de son histoire a servi à supporter de même qu'à condamner les travaux de construction. La geografía de la religio´n para los habitantes del Reino Unido naturales de Asia Sudoriental es inexorablemente vinculada a la política del entorno construído. En particular, la ubicación, o la expansión de los edificios de culto para los grupos de religiones minoritarios muchas veces ha estado estrechamente vinculado con la negociación y la contestación de la política de identidad. En este papel, examinamos el desarollo histórico de la compleja política de identidad y diferencia en un sitio de culto determinado. El edificio en cuestión es la mezquita Fazl, la primera mesquita de Londres. El papel enfoca a dos períodos en la vida arquitectural, social y religiosa del sitio: su planificación, inauguración y empleo iniciales en el barrio londinense en los años 20: y los intentos más recientes de la comunidad de ampliar la mezquita en los años 90, los cuales no resultaron exitosos. Através de estos dos períodos destacamos las maneras en que las nociones de semejanza y diferencia fueron empleadas por las personas que frecuentaban la mezquita, otros residentes locales, la prensa y cuerpos de los gobiernos local y central en sus discursos sobre la mezquita. En particular nos interesa lo que significaba la mezquita para los diferentes grupos religiosos, étnicos y sociales en las épocas bajo investigación y como la manera en que la mezquita cuadraba con las valuaciones estéticas asociativas durante toda su historia efectivamente sancionaba, tanto como condenaba, su construcción.     

The use and abuse of hostages in later Anglo‐Saxon England

This paper explores the use of hostages in political relations in Anglo‐Saxon England, often between different ethnic groups. Although much of the evidence relates to the ninth century when hostages were used as a means of guaranteeing the peace agreements made between King Alfred and his Viking adversaries, consideration will be given here to the use of hostages in the broader context of the late Anglo‐Saxon period. The paper discusses whether the significance of these arrangements lay in their projection of imperial power or in their practicality as a crude political tool whose effectiveness in maintaining an agreement lay in a tangible threat. Both of these aspects of Anglo‐Saxon hostageship are examined, especially with regard to peacemaking, the extent to which it could be successful, and why.