An Analysis of the Economic Determinants of Food Security in North Africa
Using network approach, we propose a new method of identifying key food exporters based on the long-range (LRIC) and short-range interaction indices (SRIC). These indices allow to detect several groups of economies with direct as well as indirect influence on the routes of different levels in the food network.
Non-responses caused by refusals became the main reason for surveys’ failure to provide representative data. Refusals do not occur randomly and they distort representation of certain social groups and subgroups in survey data. Criteria for external validity are seldom mentioned in publications dealing with nonresponse bias in surveys. We propose the method for estimating certain biases of sampling by calculating indicators based on sample data, which could be compared with reliable statistical data from some independent source.
The main goals, objectives and results of the ongoing project fulfillment on development and implementation of the automatized system on the collection, analysis and representation of the information about functioning of the structure of the vocational education and training (VTE) system in the Federal subjects of Russia are presented. The features and capabilities of the automatized system for different types of users, methodological and technological aspects of the interaction with users are discussed, some global statistical indicators of education on the VTE programs in the country for 2011-2012, calculated on the base of the data loaded, are given.
Author presents a review of statistical data covering results of activity of courts of common jurisdiction in Russian Federation in 2007.
We consider certain spaces of functions on the circle, which naturally appear in harmonic analysis, and superposition operators on these spaces. We study the following question: which functions have the property that each their superposition with a homeomorphism of the circle belongs to a given space? We also study the multidimensional case.
We consider the spaces of functions on the m-dimensional torus, whose Fourier transform is p -summable. We obtain estimates for the norms of the exponential functions deformed by a C1 -smooth phase. The results generalize to the multidimensional case the one-dimensional results obtained by the author earlier in “Quantitative estimates in the Beurling—Helson theorem”, Sbornik: Mathematics, 201:12 (2010), 1811 – 1836.
We consider the spaces of function on the circle whose Fourier transform is p-summable. We obtain estimates for the norms of exponential functions deformed by a C1 -smooth phase.