Self‐help in housing and chengzhongcun in China's urbanization

This article focuses on the housing issues of rural migrants arising from urbanization, with particular reference to chengzhongcun, a topic with considerable impact on policymaking. An attempt is made to understand the underlying rationale of self‐help in housing and the important role of chengzhongcun in sheltering rural migrants in the context of China's rural‐urban dichotomy. As demonstrated in this study, chengzhongcun accommodate, with little in the way of government resources and assistance, millions of rural migrants because of their social accessibility and affordability. While not denying their social problems, we argue that chengzhongcun in fact act as an innovative and positive agent to promote urbanization in present day China by housing massive numbers of rural migrants and assimilating them into cities. Current government policies towards chengzhongcun have generated a wide range of interest conflicts and confrontations. The consequences of such conflicts show that the government policies were problematic and unworkable, as they violated basic market principles as well as citizen rights. Policy strategy towards the redevelopment of chengzhongcun must acknowledge their credibility in the Chinese road to urbanization and requires more thoughtful and prudent consideration of migrants' demands for affordable housing.     

Effect Sizes in Qualitative Research: A Prolegomenon

The American Psychological Association Task Force recommended that researchers always report and interpret effect sizes for quantitative data. However, no such recommendation was made for qualitative data. Thus, the first objective of the present paper is to provide a rationale for reporting and interpreting effect sizes in qualitative research. Arguments are presented that effect sizes enhance the process of verstehen/hermeneutics advocated by interpretive researchers. The second objective of this paper is to provide a typology of effect sizes in qualitative research. Examples are given illustrating various applications of effect sizes. For instance, when conducting typological analyses, qualitative analysts only identify emergent themes; yet, these themes can be quantitized to ascertain the hierarchical structure of emergent themes. The final objective is to illustrate how inferential statistics can be utilized in qualitative data analyses. This can be accomplished by treating words arising from individuals, or observations emerging from a particular setting, as sample units of data that represent the total number of words/observations existing from that sample member/context. Heuristic examples are provided to demonstrate how inferential statistics can be used to provide more complex levels of verstehen than is presently undertaken in qualitative research.     

An Examination of the Interaction Between Modelling and Its Relationship with Construction Kits: Lessons from the Past and for the Future

Construction kits have played a significant part in nurturing the growth and development of the minds and manipulation-based skills of children (and adults) in formal and non-formal education settings. These kits have origins rooted in the representation of the built world and now have a diversity of form and function, including technical versions with moving parts. This article examines some of the historically based ideas that lie behind the role that kits may have in terms of physical modelling. The article traces the transformation of kits from simple bricks and blocks into more complicated pieces for space-filling and achieving the transfer of forces and motion. This transformation occurred during the Victorian era when the influence of the ideas of educationalists and, perhaps rather strangely, exponents of early aviation, played major roles in determining the diversity of forms of construction kit and modelled possibilities that are now to be seen in classrooms and homes. The article ends with a review of some of the lessons from the past and present that will need to be considered in relation to concrete modelling in schools for the future. This revised version was published online in July 2006 with corrections to the Cover Date.     

The demand for small cars in the United States: Implications for energy conservation strategies

The purpose of this paper was to investigate the impact of household characteristics and preferences for Japanese cars on the demand for small cars in the United States. Two stage probit analysis was used to examine the impact of various explanatory variables on the purchase decision. The results indicated that preferences for Japanese cars, income, price and several household characteristics had a significant impact on the probability of purchasing a small car. The results of this study provide support for freer trade in automobiles and higher gasoline taxes as energy conservation strategies.

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Zusammenfassung Die Nachfrage nach Kleinwagen in USA: Implikationen für Strategien zur Energieeinsparung. Diese Untersuchung wollte herausfinden, wie sich Haushaltseigenschaften und Präferenzen für japanische Autos auf die Nachfrage nach Kleinwagen in den Vereinigten Staaten auswirken. Die Stichprobe umfa\te 367 Haushalte, die im Jahr 1986 ein neues Auto kauften. Davon kauften 141 Haushalte amerikanische Kleinwagen, 84 japanische Kleinwagen und 142 Haushalte kauften gro\e amerikanische Wagen. Eine zweistufige Probit-Analyse prüfte den Einflu\ der verschiedenen Erklärungsvariablen auf die Kaufentscheidung. Die Ergebnisse besagen im wesentlichen, da\ es die Präferenzen für japanische Autos, das Einkommen, der Preis und einige Haushaltseigenschaften sind, die einen signifikanten Einflu\ auf die Wahrscheinlichkeit eines Kleinwagenkaufs haben. Die Autoren sehen in den Ergebnissen eine Unterstützung für die Forderung nach Freihandel im Automobilsektor und nach höherer Besteuerung von Kraftstoffen als Strategien zur Energieeinsparung.

     

DURATION MOMENTS AND YIELD CURVE MOVEMENTS

In this paper we will analyze the relationship between the value and duration moments of a cash flow and movements in the yield curve. We will show that for changes in the yield curve which can be related to tⁿ , the 1st order changes in the net present value of a cash flow are linearly dependent on the n + lth duration moments, and that the 2nd order changes are dependent on the sum of duration moments of order 2 n + 1 and 2 n + 2. We will use this relationship to tilt tracking portfolios so as to protect them against specific changes in the yield curve.     

施工企业对外承接项目的价值评估

本文通过工程实例说明,提供了作者进行施工企业评估过程中对其对外承接项目评估的思路和方法.提出了施工企业对其在外所承接项目的权益是一种债权,同时明确了合理确定项目给企业所能带来的应收工程款以及取得应收工程款可能发生的风险是此类项目评估的核心.