نتایج جستجو برای: sample selection biasjel classification j31
تعداد نتایج: 1149883 فیلتر نتایج به سال:
Inter-industry Wage Dispersion in Portugal: high but falling This paper examines the size of inter-industry wage dispersion in Portugal and compares with other countries. We find that the country has a high inter-industry wage inequality compared with the European standard. Nevertheless, the dispersion reduced over the 1980s and the early 1990s along a process of centralisation of the wage sett...
In this paper we explore the application of structured additive distributional regression for the analysis of conditional income distributions in Germany following the reunification. Using a bootstrapped Kolmogorov-Smirnov test we find that conditional personal income distributions can generally be modelled using the three parameter Dagum distribution. Additionally our results hint at an even m...
land cover classification is one of the most important applications of polarimetric radar images, especially in urban areas. there are numerous features that can be extracted from these images for the use of their high potential, hence feature selection plays an important role in polsar image classification. in this study, three main steps are used to improve the classification: 1) feature extr...
In this paper I use extensive spatial variation in end-of-communism local skill endowment to test for the presence of human capital spillovers and to understand the regional variation in returns to education in a transition country — the Czech Republic. The evidence is consistent with a tendency of skill-intensive production to locate in areas relatively abundant in skills, but I find no eviden...
Fairness, Reciprocity, and Wage Rigidity This paper contains a review of empirical work related to wage rigidity, where researchers have collected their own data. The work includes field studies, economic experiments, and psychological surveys. Economists have done the field studies and experiments, and management scientists and experimental psychologists have done the surveys. There is a remar...
In this paper we characterise the selection into parenthood for men and women separately and estimate effects of motherhood and fatherhood on wages. We apply propensity score matching exploiting an extensive high-quality register-based data set augmented with family background information. We estimate net effects of parenthood and find that mothers receive 7.4% lower average wages compared to n...
MOTIVATION Identification of differentially expressed genes is a major issue in gene expression data analysis and selection of marker genes is critical in tumor classification using gene expression data. In this paper, we propose a semiparametric two-sample test to identify both differentially expressed genes and select marker genes for sample classification. RESULTS A simulation study shows ...
A Large-Scale Validation Study of Measurement Errors in Longitudinal Survey Data In this paper, we analyze measurement and classification errors in several key variables, including earnings and educational attainment, in a matched sample of survey and administrative longitudinal data. The data, spanning 1994-2001 and covering all sectors in the Danish economy, are much more comprehensive than u...
Robustness of feature selection techniques is a topic of recent interest, especially in high dimensional domains with small sample sizes, where selected feature subsets are subsequently analysed by domain experts to gain more insight into the problem modelled. In this work, we investigate the robustness of various feature selection techniques, and provide a general scheme to improve robustness ...
the minimum wage determination is one of the most significant economic issues exerting effects on macroeconomic variables. this study provides an empirical model using var method to analyze the long run relationships and short run dynamisms of factors affect general price level (with emphasis on minimum wage) during the period of 1978-2010. to examine long run relationships we used johansen-jus...
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