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14 Impediments to the enforcement of youth access laws 14 Smoking cessation and mortality trends among two United States populations

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and Wallis 1952 ) detects if n data groups either belong or not belong to the same population. Since it is a non-parametric method, the Kruskal–Wallis test does not assume a normally distributed population, which makes it ideal for scientometric

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population of messages. That is, given how often people request feedback, we would expect about 13% of the messages with responses to be requests for feedback. The observed proportion of almost 30% indicates that explicit requests for feedback are successful

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Scientometrics
Authors: Carlo Caputo, Jaime Requena, and Domingo Vargas

—normalized by population; Chile, Uruguay, Argentina Brazil, Trinidad Tobago, México, Panamá and Jamaica precede it and the ratio between Chile scientific production and Venezuela's is 1.5, while compared to Argentina, the relation is 1.45. Venezuelan

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publications output of top 24 most productive countries in computer science during 1999–2008 was also compared with their population (in millions, 2009) and Gross Domestic Product (PPP, US $, 2009). On per capita basis, Singapore produced the highest number of

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Journal of Applied Econometrics 0.005842 0.003193 0.002959 0.004349 C Population and Development

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journal and brings to light the state of research in a given sector when it was best-known (Callon et al. 1993 ). On the basis of the impact factor, we selected 16 journals, the equivalent of 1.2% of the total journal “population” and 35% of the articles

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data on PhD students’ participation in the production of new knowledge. In order to shed light on this question, this paper presents the results of the first large-scale survey of PhD students’ publication activity, using the whole population of PhD

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Scientometrics
Authors: Cathelijn J. F. Waaijer, Cornelis A. van Bochove, and Nees Jan van Eck

distribution is based on the manual classification of the sample of editorials. The sample results have been raised to population totals using the inverse of the sample fraction. This has been done to achieve easy comparability with the population-based results

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