Acta Universitatis Lodziensis. Folia Oeconomica nr 286/2013: Ostatnio dodane
Wyświetlanie pozycji 1-20 z 37
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Indirect Estimation Accounting for Spatial Autocorrelation in Economic Statistics
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The authors present results of a study which attempted to use indirect estimation methods (including a method accounting for spatial correlation) to estimate certain characteristics enterprises. The study relied on data ... -
On the Use of the Extreme Value Distribution in Monitoring Production Processes
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)In many statistical applications the main point of interest is estimating some population central characteristic such as the mean or the median. The Shewhart’s control chart X is based on monitoring the average process ... -
{Depthproc} Package in Multivariate Time Series Mining
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)In this paper we present our novel R package {depthproc} which implements several multivariate statistical procedures induced by statistical depth functions and we discuss some examples and applications of the package ... -
Conjoint Analysis as a Method of Analysing Consumer Preferences on Example of Municipal Transport Market
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Satisfying customers' needs, is a challenge for many companies in today’s rapidly changing environment. To study customer needs and preferences conjoint analysis can be used. Conjoint analysis is a multidimensional method ... -
On Estimation of a Quantity of Base Models with Parametric z and Permutation Tests
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)One of the crucial problems in multiple-model approach of the regression is estimation of optimal number of base models. If the quantity is too low – it increases the prediction error whereas too high number of models ... -
Optimal Weighing Designs for Estimation of Total Weight
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Optimal chemical and spring balance weighing designs for estimation total weight are considered. In this paper we study weighing designs in which the errors are non-positive correlated and have equal variances. A lower ... -
Modification of Hinov Method of Variable Selection for Multiple Cluster Structure Analysis
Korzeniewski, Jerzy
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)
The original HINoV method (Carmone et al., 1999 ) is not robust to the presence of correlated unimodal and uniform variables among noisy variables (e.g. Korzeniewski, 2012). Moreover, HINoV can be applied only to a single ... -
Construction of the Measurement Scale for Consumer’s Attitudes in the Frame of One-Parametric Rasch Model
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The article discusses issues concerning the scale design based on one-parametric Rasch model in the context of consumers’ attitudes. The first part describes the specificity of the measurement in the light of Item Response ... -
Comparison of Accuracy of Affinity Propagation Method and Cluster Ensembles Based on Co-Occurrence Matrix
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)High accuracy of results is a very important task in any grouping problem (clustering). It determines effectiveness of the decisions based on them. Therefore in the literature there are proposed methods and solutions ... -
Cluster Analysis – Symbolic vs. Classical Data
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Clustering problem is addressed in many contexts and disciplines. Although there are numerous studies on cluster analysis, there is a lack of a review to complete and systematize knowledge of research approach depending ... -
Gravity Unfolding Analysis for Asymmetric Similarities Matrix
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The multidimensional unfolding analysis which uses in the structure the gravity function allows consideration and analysis of additional factors (such as market share or brand loyalty), which affect the assessments of ... -
Stepwise Multiple Tests Procedures for Discrete Distributions
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)We presented some properties of new procedures of multiple hypotheses testing for discrete distributions. We choose the new procedure stepwise TWWk, based on Tarone, Westfall and Welfinger ideas. We compare this procedure ... -
Sequence of Experimental Trials and Factorial Design of Experiment Realization Costs
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Design of experiment is one of statistical methods of quality control which allows to appropriate preparation of the production process. Statistical design of experiment allows to set the level and to determine the ... -
Financial Inclusion Indicators in Poland
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Financial inclusion refers to a state in which all working age adults have effective access to credit, savings, payments, and insurance from formal service providers. The aim of this paper is to introduce several indicators ... -
On Time Series Prediction Based on Control Chart
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Control charts are the most commonly used quality control tools. These tools are dedicated to monitoring processes characteristic over time. Control charts may be successfully applied in other statistical areas. The ... -
On Some Simulation Procedures for Comparing Nonparametric Methods of Regression
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Nonparametric methods of regression form a large group of varied and rapidly growing methods. In many situations we have a problem with comparing these methods in order to select one of them to solve the regression ... -
Influence of Unemployed Person Age on the Hazard and its Changes in Time
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The aim of the article is to analyse the influence of unemployed person’s age on job seeking time. This influence can changes in time. That analysis is possible by using Cox nonproportional hazard model. We get the marks ... -
Feature Selection in High Dimensional Regression Problem
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)There are three main approaches to feature selection problem considered in statistical and machine learning literature: filters, wrappers and embedded methods. Filters evaluate and exclude some variables before learning ... -
Odds Ratios in the Analysis of Contingency Table
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Association and relationship is one of the most important tasks in statistical analysis. The main objective of the study is to examine odds ratios as a framework for understanding of contingency tables and log-linear ... -
Comparison of Estimators of a Probability of Success in Two Models
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)In modeling two valued phenomena a binomial or negative binomial model is applied. In the paper minimum variance unbiased estimators of a probability of success obtained in two models are compared.