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Tytuł:
Rodzina modeli Lee-Cartera
Autorzy:
Ojrzyńska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/587418.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody prognozowania
Metody statystyczne
Umieralność
Forecasting methods
Mortality
Statistical methods
Opis:
This paper presents a proposal for the application of selected models of the group of models using the Lee and Carter methodology for forecasting mortality rates. These include the original Lee-Carter, the Lee-Miller (2001) and Booth-Maindonald-Smith (2002) variants, and the more flexible Hyndman-Ullah (2005) and de Jong (2006) extensions. Based on estimates of mortality rates derived from the selected models was verified the ability to use these models to estimate mortality rates in Poland.
Źródło:
Studia Ekonomiczne; 2013, 162; 99-106
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozkład Lambda-Tukeya i próba jego zastosowania
Lambda-Tukey Distribution and Application Attempt
Autorzy:
Domański, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/591590.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody statystyczne
Statystyka ekonomiczna
Wnioskowanie statystyczne
Economic statistics
Inferential statistics
Statistical methods
Opis:
In the article the generalized Lambda-Tukey distribution was presented with the following four parameters of: location, scale, skewness and kurtosis. The distribution presented, due to its high flexibility is widely applied, especially when empirical distributions are sophisticated and do not show desired accordance with known classical theoretical distributions. The examples presented on the fitting of the DAX index distribution to the four parameter Tukey distribution turn out to be better than the ones for the beta distribution.
Źródło:
Studia Ekonomiczne; 2013, 152; 20-31
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprawdzanie jednorodności jakości materiałów niekształtnych z wykorzystaniem rozkładów wartości ekstremalnych
The Use of Extreme Value Distributions in Checking the Quality Shapeless Materials Homogeneity
Autorzy:
Kończak, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/590162.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody statystyczne
Statystyka
Zmienne losowe
Random variable
Statistical methods
Statistics
Opis:
For quality control it is essential that the control samples are homogeneous. In practice this is impossible, and the requirement can be reduced to the condition that the samples were taken from the same population. The study presented in the paper is an analysis of the issue of testing the quality of the shapeless material. As a shapeless material is referred to the material from which it is impossible to directly extract the individual elements, packages, etc. This paper proposes a method to verify the hypothesis that the tested material is homogeneous due to the observed characteristics.
Źródło:
Studia Ekonomiczne; 2013, 152; 82-94
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust Ordinal Regression Applied to TOPSIS
Autorzy:
Zielniewicz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/578516.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analiza wielokryterialna
Odporne metody statystyczne
Multicriteria analysis
Robust statistical methods
Opis:
This paper proposes a new method for ranking a nite set of alternatives evaluated on multiple criteria. The presented method combines the robust ordinal regression (ROR) approach and the ranking score based on the aggregate distance measure function coming from the TOPSIS method. In our method, the preference model is a set of ad- ditive value functions compatible with a non-complete set of pairwise comparisons of some reference alternatives given by the decision maker (DM). Based on this set of compatible value functions, we dene an ag- gregate function representing relative closeness to the reference point (ideal solution) in the value space. The ranking score determined by this distance measure is then used to rank all alternatives. Calculating the distance in the value space permits to avoid normalization used in TOPSIS to transform original evaluations on different criteria scales into a common scale. This normalization is perceived as a weakness of TOPSIS and other methods based on a distance measure, because the ranking of alternatives depends on the normalization technique and the distance measure. Thus, ROR applied to TOPSIS does not only facilitate the preference elicitation but also solves the problem of non-meaningfulness of TOPSIS. Finally, an instructive example is given to illustrate the proposed method.
Źródło:
Multiple Criteria Decision Making; 2013, 8; 178-196
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielokryterialne porządkowanie metodą PROMETHEE odporne na zmiany wag kryteriów
A Promethee-based Multicriteria Ranking Robust to Changes of Criteria Weights
Autorzy:
Sobotka, Olena
Powiązania:
https://bibliotekanauki.pl/articles/588327.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analiza wielokryterialna
Odporne metody statystyczne
Multicriteria analysis
Robust statistical methods
Opis:
The approach described in article is based on the Linear Partial Information (LPI) by E. Kofler. The robust multicriteria ranking is based on the robust dominance relations, which holds under all admissible combinations of criteria weights. In the article the robust dominance relation is defined and the robust ranking method based on the PROMETHEE outranking relations is proposed.
Źródło:
Studia Ekonomiczne; 2013, 163; 209-219
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane statystyki odporne
Some Robust Statistical Methods
Autorzy:
Trzpiot, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/586408.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Estymatory
Metody statystyczne
Modele regresji
Statystyka
Estimators
Regression models
Statistical methods
Statistics
Opis:
Outliers are sample values that cause surprise in relation to the majority of the sample. This is not a pejorative term; outliers may be correct, but they should always be checked for transcription errors. Many robust and resistant methods have been developed since 1960 to be less sensitive to outliers. This methods can be used instead or be even better than classical one. Robust methods were used early in me works (Trzpiot 2009, 2011a, 2011b) as an application in finance and economy. This article has a descriptive character, connected with new book for students.
Źródło:
Studia Ekonomiczne; 2013, 152; 163-173
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Prediction of Time Series on the Basis of Rank Correlation Coefficients
Autorzy:
Wywiał, Janusz L.
Powiązania:
https://bibliotekanauki.pl/articles/587778.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody statystyczne
Statystyka matematyczna
Szeregi czasowe
Mathematical statistics
Statistical methods
Time-series
Opis:
In the paper the problem of prediction of a time series is considered. Time series observations can be measured on order scale. On the basis of observed ranks of values of the variables observed in the past periods a forecast of the rank of the observation in the future period is determined. The proposed method results from the derivation of the distribution of the well known Kendall's rank coefficient. The paper was inspired by a lecture of Jean H.P. Paelinck who gave it at the University of Economics in Katowice when he received the title of doctor honoris causa of the University in 1987.
Źródło:
Studia Ekonomiczne; 2014, 189; 19-26
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Some Tests of Fixed Effects for Linear Mixed Models
Autorzy:
Krzciuk, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/592974.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metoda Monte Carlo
Metody statystyczne
Modele matematyczne
Mathematical models
Monte Carlo method
Statistical methods
Źródło:
Studia Ekonomiczne; 2014, 189; 49-57
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Country Market Selection in International Expansion Using Multicriteria Decision Aiding Methods
Autorzy:
Górecka, Dorota
Szałucka, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/578502.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody statystyczne
Pozycja przedsiębiorstwa na rynku
Rynki międzynarodowe
Business strength
International market
Statistical methods
Opis:
Companies, facing globalization and technological revolution, are constantly forced to search for new ways to grow and develop. A profitable growth strategy can be built through international expansion. Recently it has become one of the few effective ways to develop and enhance the competitiveness of a company in response to the changing dynamics of the global economy. When a company is expanding its business operations to overseas markets a number of strategic decisions must be taken. The company must define the product it wants to market (what), the country market it wants to enter (where), the timing of entry (when) and the entry mode it wants to use (how). Consequently, the country market selection plays a critical role in shaping the performance of foreign activities and influences the future success of the company. This is a complex and difficult decision, requiring the company to analyse a wide spectrum of factors that affect both investment efficiency and effectiveness. The location selection in international expansion may be determined by general macroeconomic factors, demand factors, socio-political factors or cost factors. The purpose of this paper is to conduct a simulation of the market selection decision with the help of multi-criteria decision aiding methods based on the perspective of a dynamically developing company that is a leading manufacturer and distributor of hygiene, cosmetic and medical products.
Źródło:
Multiple Criteria Decision Making; 2013, 8; 32-55
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternatywne oceny ryzyka systematycznego w modelu CAMP
Alternative Method of Systematic Risk Measurement in CAMP Model
Autorzy:
Trzpiot, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/589000.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Ocena ryzyka
Odporne metody statystyczne
Regresja liniowa
Linear regression
Risk assessment
Robust statistical methods
Opis:
In linear regression model, estimated by last square method, the coefficient of determination gives as an information about ratio of variance of dependence variable describe by chosen in linear relation independence variable. We give the new range of this concept by description the coefficient of determination for chosen robust regression models. We proposed the description of the problem in economic contests, instead that the problem of measurement of systematic risk is a very general issue.
Źródło:
Studia Ekonomiczne; 2013, 162; 9-20
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preference-Driven Multiobjective Optimization Using Robust Ordinal Regression for Cone Contraction
Autorzy:
Kadziński, Miłosz
Słowiński, Roman
Powiązania:
https://bibliotekanauki.pl/articles/578592.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Odporne metody statystyczne
Optymalizacja wielokryterialna
Podejmowanie decyzji
Decision making
Multiple criteria optimization
Robust statistical methods
Opis:
We present a new interactive procedure for multiobjective optimization problems (MOO), which involves robust ordinal regression in contraction of the preference cone in the objective space. The most preferred solution is achieved by means of a systematic dialogue with the decision maker (DM) during which (s)he species pairwise comparisons of some non-dominated solutions from a current sample. The origin of the cone is located at a reference point chosen by the DM. It is formed by all directions of isoquants of the achievement scalarizing functions compatible with the pairwise comparisons of non-dominated solutions provided by the DM. The compatibility is assured by robust ordinal regression, i.e. the DM's statements concerning strict or weak preference relations for pairs of compared solutions are represented by all compatible sets of weights of the achievement scalarizing function. In successive iterations, when new pairwise comparisons of solutions are provided, the cone is contracted and gradually focused on a subregion of the Pareto optimal set of greatest interest. The DM is allowed to change the reference point and the set of pairwise comparisons at any stage of the method. Such preference information does not need much cognitive e ort on the part of the DM. The phases of preference elicitation and cone contraction alternate until the DM nds at least one satisfactory solution, or there is no such solution for the current problem setting.
Źródło:
Multiple Criteria Decision Making; 2013, 8; 67-83
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Equal-Precision Stratification in Domains Subject to Fixed Sample Size
Autorzy:
Kozak, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/591344.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Algorytmy
Dobór próby badawczej
Metody statystyczne
Statystyka
Algorithms
Selection of test methods
Statistical methods
Statistics
Opis:
Stratified sampling is one of the most common sampling designs in economic surveys of official statistics. Independent sampling in domains is of special interest for practical reasons; for instance, in Polish economic surveys voivodeships constitute the domains, and in many surveys estimation is required for both the whole country and each voivodeship. The objective of the paper is to present two algorithms for stratification in domains, a population under study is subdivided into, orientated towards minimizing a common value of the coefficients of variation of an estimator considered in the domains, subject to fixed sample size from the whole population. An application of the algorithms and their comparison is presented for an artificial population comprising four domains.
Źródło:
Studia Ekonomiczne; 2014, 189; 7-18
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zdolności procesu o zależnych charakterystykach
Process Capability Analysis for Processes with Dependent Characteristics
Autorzy:
Szerszunowicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/585656.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Karty kontrolne
Kontrola jakości
Metody statystyczne
Proces produkcji
Control charts
Production process
Quality control
Statistical methods
Opis:
One of the most important tools of statistical quality control is a process capability analysis. In order to measure process capability the most used are indices constructed for one-dimensional characteristic of production process. However often production process is described by more than one characteristic. One should then conduct a multidimensional assessment of process capability with appropriately designed indicators. The aim of this article is to analyze the problem of process capability measure of multi-dimensional process with dependent characteristics, using a proposed multidimensional process capability index.
Źródło:
Studia Ekonomiczne; 2013, 152; 153-161
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie shift share analysis w opisie zmian struktury honorowych dawców krwi w Polsce
Use Shift Share Analysis of Changes in the Description of the Structure of Blood Donors in Poland
Autorzy:
Trzpiot, Grażyna
Szołtysek, Jacek
Ojrzyńska, Anna
Twaróg, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/587446.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analizy głównych komponentów
Badania empiryczne
Krwiodawstwo
Metody statystyczne
Blood donation
Empirical researches
Principal Component Analysis
Statistical methods
Opis:
The aim of this paper is to show and compare different levels of risk during a day and during a week on spot markets from the Polish Power Exchange (POLPX) and the European Energy Exchange (EEX). Based on Principal Component Analysis (PCA) the classification of contracts from the two power exchanges was made. The classification was made for linear rates of return of 24 contracts listed on the power exchanges from 01.2009 to 24.10.2012. Additionally, the 24 contracts were divided into seven groups dependent on the day of a week. Based on these data sets the classification of risk during a week was made.
Źródło:
Studia Ekonomiczne; 2013, 162; 85-98
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Re-Calculation of Happy Planet Index Using DEA Models
Autorzy:
Jablonsky, Josef
Powiązania:
https://bibliotekanauki.pl/articles/578570.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analiza wielokryterialna
Jakość życia
Metody statystyczne
Podejmowanie decyzji
Quality of life
Decision making
Statistical methods
Multicriteria analysis
Opis:
Happy Planet Index (HPI) is an aggregated index that measures the extent to which each nation produces long and happy lives per unit of environmental input. The HPI uses global data on life expectancy, experienced well-being, and ecological footprint to rank countries. The last HPI report was published in 2012 and it contains data for 151 countries from all continents. The aim of the paper is to re-calculate the HPI using DEA models and other multiple criteria decision making techniques and compare the results obtained results. MCDM methods evaluate alternatives (countries) according to the set of criteria with respect to given preferences. Most of them allow ranking of alternatives according to aggregated indices defined by various methods. DEA models compare the countries with the best performers in the data set and measure the efficiency of transformation of multiple inputs into multiple outputs. Even though they are based on different principles than MCDM methods they allow ranking of evaluated units according to their efficiency or super-efficiency scores. The paper analyzes both methodological approaches and compares their results.
Źródło:
Multiple Criteria Decision Making; 2013, 8; 56-66
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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