Experimental evidence on rational inattention

We show that rational inattention theory of Sims (2003) provides a rationalization of choice models à la Luce and gives a structural interpretation to probability curvature parameters as reflecting costs of processing information. We use data from a behavioral experiment to show that people behave according to predictions of the theory. We estimate attitudes to risk and costs of information for individual participants and document overwhelming heterogeneity in these parameters among a relatively homogeneous sample of people. We characterize, both theoretically and empirically, the aggregation biases this heterogeneity implies and find these biases to be substantial.Risk management ; Econometrics

The labor wedge as a matching friction

The labor wedge accounts for a large fraction of business cycle fluctuations. This paper uses a search and matching model to decompose the labor wedge into three classes of labor market frictions and evaluate their role. We find that frictions to job destruction and bargaining commonly considered in the search literature are not helpful in explaining the labor wedge. We also identify an asymmetric effect of separation, bargaining and matching frictions on unemployment, as well as a potential solution to Shimer's puzzle.Business cycles - Econometric models ; Labor supply ; Unemployment ; Labor turnover

X-radiation of the moon and Roentgen cosmic background according to data of AMS ''Luna-12''

Satellite measurements of lunar soft X radiation, and Roentgen cosmic backgroun

Was Stalin Necessary for Russia's Economic Development?

This paper studies structural transformation of Soviet Russia in 1928-1940 from an agrarian to an industrial economy through the lens of a two-sector neoclassical growth model. We construct a large dataset that covers Soviet Russia during 1928-1940 and Tsarist Russia during 1885-1913. We use a two-sector growth model to compute sectoral TFPs as well as distortions and wedges in the capital, labor and product markets. We find that most wedges substantially increased in 1928-1935 and then fell in 1936-1940 relative to their 1885-1913 levels, while TFP remained generally below pre-WWI trends. Under the neoclassical growth model, projections of these estimated wedges imply that Stalin's economic policies led to welfare loss of -24 percent of consumption in 1928-1940, but a +16 percent welfare gain after 1941. A representative consumer born at the start of Stalin's policies in 1928 experiences a reduction in welfare of -1 percent of consumption, a number that does not take into account additional costs of political repression during this time period. We provide three additional counterfactuals: comparison with Japan, comparison with the New Economic Policy (NEP), and assuming alternative post-1940 growth scenarios

Image and Spectrum of the Sun in the Region 9.5-200 Angstrom

Short wave ultraviolet image and spectrum of sun obtained during course of X-ray flar

Labor matching: putting the pieces together

The original Mortensen-Pissarides model possesses two elements that are absent from the commonly used simplified version: the job destruction margin and training costs. I find that these two elements enable a model driven by a single aggregate shock to simultaneously explain most movements involving unemployment, vacancies, job destruction, job creation, the job finding rate and wages. The job destruction margin's role in propagating aggregate shocks is to create an additional pool of unemployed at the onset of a recession. The role of training costs is to explain the simultaneous decline in vacancies and slow response of job creation.Unemployment ; Job creation ; Employment ; Business cycles

Educational Robotics as a Factor in the Development of Network Interaction in the System of Engineering Training

Introduction. Educational robotics is a new learning technology and an effective tool for training engineering staff. Networking of educational organizations and enterprises expands their potential in the system of level engineering training. The main idea of the article is to create and test a local model of an effective networked educational system in the context of federal and regional concepts and programs that would meet the development trends of modern society and at the same time would allow the preparation of schoolchildren for real participation in practical activities. Materials and Methods. We conducted a theoretical analysis of foreign and domestic literature. The method of scientific modeling, namely, the creation of a graphic hierarchical model was applied to develop an integrated system of engineering education for schoolchildren. When organizing the practical use of the model, pedagogical design, comparative analysis of verification works, sociological tools and criterial formative evaluation are used. Results. Authors made an attempt of systematization of subjects and forms of lifelong engineering education at the stages from preschool to higher, based on research conducted over six years. It is defined that the subject of inter-agency coordination network between participants of educational organizations. A tool to ensure continuity in the transition to a new level of education, and the implementation of interdisciplinary component pre-engineering education are interdisciplinary programs, in particular, robotics. Implementation of programs on robotics is carried out through curricular and extracurricular activities, additional education program, vacation employment and other forms of work, provided resources as the base of the organization and network partners. The author’s summer program of the camp “Technosphere” was developed and approved with the day-time stay of children during the vacation period. The model of the Integrated System of Level Engineering Engineering for Schoolchildren was developed and introduced into the city’s education system. Discussion and Conclusions.The system of level engineering training, which combines the levels of education, additional educational programs and the potential of network interaction, allows to optimize all directions and forms of organization of the educational process. As a result of the study, a model of an integrated system of level engineering training at the stage of pre-school and primary general education was developed

Zuverlässiges Structure-From-Motion für Bildpaare

Diese Arbeit stellt einen neuen Ansatz vor, eine Rekonstruktion von 3D-Geometrie aus einfachen Fotos durchzuführen. Diese Fotos wurden von Kameras aufgenommen, von denen weder die relative Position und Blickrichtung im Raum, noch die internen Abbildungsparameter bekannt sind. Das Grundelement dieses Ansatzes sind Bildpaare, aus denen bereits eine metrische Rekonstruktion gewonnen wird. Daraus ergibt sich eine Vereinfachung des Rekonstruktionsprozesses, da bisher üblicherweise mindestens Bildtripel für diesen Schritt notwendig waren. Zudem wird gezeigt, wie die aus Bildpaaren gewonnenen Teilrekonstruktionen zu einer vollständigen Rekonstruktion, die alle Kamerapositionen gleichzeitig umfasst, zusammengefügt werden können