Reaching Migrants in Survey Research: The Use of the Global Positioning System to Reduce Coverage Bias in China

Mingming Shen Department of Political Science, School of Government, 416 Library Building, Peking University, Beijing, China 100871 e-mail: shenmm{at}rcccpku.org List-based samples are often biased because of coverage errors.The problem is especially acute in societies where the levelof internal migration is high and where record keeping on thepopulation is not reliable. We propose a solution based on spatialsampling that overcomes the inability to reach migrants in traditionalarea samples based on household lists. A comparison betweena traditional study and our sample of Beijing demonstrates thatcoverage bias is greatly reduced. The successful incorporationof mobile urban residents has important substantive effects,in both univariate and multivariate analyses of public opiniondata.     

法国合宪性审查的五十年

目次一、宪法委员会的设立二、提请审查主体的扩大三、宪法委员会职权的扩大四、宪法委员会判决的权威五、宪法委员会与法官的对话六、结语一、宪法委员会的设立1.这可以是一个哲学思考的主题:在法国大革命之后必须等待一个半     

‘What Can You Say, Words It Is, Nothing Else Going’

This essay examines the capacity of language (‘word’) to convey what there is (‘world’). It draws on philosophical thought, which it seeks to apply to law while making specific reference to comparative legal studies, that is, to the investigation of law that is foreign to its interpreter.     

Le Raisonnement Juridique: Une Pratique Spécifique?

Selon une thèse largement partagée, le droit et une pratique sociale et les contributions des participants sont complémentaires les unes des autres. Dans ces conditions, le raisonnement juridique consiste d’abord en une interprétation de ces pratiques et présuppose un point de vue interne de la part de celui qui souhaite en rendre compte. Le raisonnement juridique est ainsi conçu comme une argumentation pratique, subordonnée aux exigences de la rationalité car ceux qui participent à la pratique juridique sont contraints de donner des raisons à leur action et ces raisons tissent un réseau de contraintes. Très séduisante, cette thèse qui doit beaucoup à la critique des réalistes par Hart, n’en demeure pas moins justiciable de quelque critique.     

The critique of language and its economy

Abstract

This paper draws upon and develops Paul Rabinow's concept of biosociality to analyse how the field of gambling research, the facts about gambling addiction and the politics of gambling regulation are in the process of transforming one another as the US gambling industry has begun to provide large amounts of funding for scientists and clinicians working on gambling problems. In particular, the paper focuses on the political economy of research that suggests that the negative consequences associated with gambling are not just social problems, but neurobiological ones. The paper introduces the notion of ‘biopolitical capital’ in order to describe how the gambling industry invests in particular kinds of research which are more likely to yield results that can be mobilized to support particular kinds of approaches to dealing with the social and personal problems associated with gambling.     

Sugar and fatty acid analysis in ecstasy tablets

Sugars and stearates (composed of fatty acids) are both frequent components used in the production of ecstasy tablets. Their analysis can therefore provide supplementary information useful for drug intelligence. Links established using these substances would be very significant as they should give us information about the manufacturer of the tablets. Two methods have been developed for the analysis of sugars and fatty acids by GC-MS and were applied to 109 ecstasy tablets. Characterisation of the samples should allow the differentiation of a certain number of them and furthermore their classification into groups. This is obtained by analysing the raw data using chemometric methods. Several pre-treatments have been tested together with six similarity measures on a small number of ecstasy samples in order to determine which combination would best characterise one ecstasy sample and differentiate it from the others at the same time. Normalisation followed by the fourth square and applied together with the squared cosine function appeared to give the best results and has been applied to all samples. The correlation values obtained of each sample with all others express the probability of a presence of a link between two samples. In order to verify the signification of these values, and thus of a link, all samples have been compared considering the data visually according to three selected criterions. The 109 examined samples could be divided into 67 groups, with 43 of them containing only one sample. Considering the distribution of their correlation values, sample pairs showing a value below 0.23 can be considered as linked. As the excipients are necessarily related to the blending, which also includes the active substance, and variation in the excipient content has been proven by the grouping of the samples, a low similarity value does indicate a link with regard to the producer. In conclusion, it appears that the result obtained with the excipients is certainly very valuable, but all other available information has to be taken into account as well before making any conclusions.