Acta Universitatis Lodziensis. Folia Oeconomica: Recent submissions

Now showing items 1481-1500 of 4530

    • Discrimination of Symbolic Objects 

      Dudek, Andrzej (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      Symbolic Data Analysis is an extension of multivariate analysis dealing with data represented in an extended form. Each cell in symbolic data table (symbolic variable) can contain data in form of single quantitative ...

    • Feature Selection and Multiple Model Approach in Discriminant Analysis 

      Gatnar, Eugeniusz (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      Significant improvement of model stability and prediction accuracy in classification and regression can be obtained by using the multiple model approach. In classification multiple models are built on the basis of training ...

    • About Phase Transitions in Kendall’s Shape Space 

      Kosiorowski, Daniel (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In our article, we discuss the choice of space shape, appropriate for describing an economic process and analyze usefulness of the metrics proposed by I. L. Drуden and K. V. Merida (1998). We introduce and interpret the ...

    • Sequential Tests with Power Equal to 1 for Chosen Location Parameters 

      Pekasiewicz, Dorota (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      We often verify hypotheses about random variable distribution parameters, when the variable distribution is unknown. In these cases we apply nonparametric tests, in particular nonparametric sequential tests. This paper ...

    • Verification of Hypotheses Concerning Parameters of the Regression Model for Complex Samples 

      Domański, Czesław (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      The paper considers the linear regression function y = βx + ε, where β is a vector of unknown parameters and ε is a rest component. In case of complex samples some modifications of test statistics should be made. Results ...

    • Kriging - A Method of Statistical Interpolation of Spatial Data 

      Kowalik, Jan (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In analyses of spatial phenomena it can sometimes be impossible or very expensive to obtain the value (realization) of a studied phenomenon at all its locations because of practical constraints. Then in order to estimate ...

    • Estimation of Bias and Variance of Sample Median by Jacknife and Bootstrap Methods 

      Pruska, Krystyna (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In the paper the estimation of sample median bias and variance by jackknife and bootstrap methods are considered. Monte Carlo analysis of properties of estimators is presented (mean of bias and mean of variance for some ...

    • Analysis of Linear Regression Model at Divided System Matrix 

      Budka, Anna; Wagner, Wiesław (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In this study problems connected with the detection of influential observations are investigated in the linear regression model using the least squares estimation of structural parameters. This issue has been presented ...

    • Joint Monitoring of the Mean, Dispersion and Asymmetry in Process Control 

      Kończak, Grzegorz (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In this paper the quadratic form of sample mean, sample variance and sample asymmetry is considered. This quadratic form can be used for testing hypothesis on the expected value, variance and asymmetry of observed variable. ...

    • Multiple Additive Regression Trees (MART) and their Application 

      Trzęsiok, Joanna (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      Multiple additive regression trees MART is a methodology for trying to solve prediction problems in regression and classification. It’s one of the boosting methods. It was introduced by J. H. Friedman (1999a). Besides ...

    • Introduction 

      Domański, Czesław; Pekasiewicz, Dorota (Wydawnictwo Uniwersytetu Łódzkiego, 2007)

    • Multiple Endpoints 

      Parys, Dariusz (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In ANOVA we are mainly based on inter-treatment comparisons. Another common problems arising in biometric studies (especially in biomedical studies) is that of comparing two groups of patients (treatment and a control ...

    • On some Inferential Procedures for Receiver Operating Characteristic Curves 

      Rossa, Agnieszka (Wydawnictwo Uniwersytetu Łódzkiego, 2006)
      In the paper two significance tests for receiver operating characteristic curves (ROC) are proposed. Both tests use an asymptotic χ² distribution of the test statistics.

    • Some Nonparametric Estimators of Regression Function 

      Baszczyńska, Aleksandra (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      In the paper some nonparametric estimators of regression function are studied: Nadaraya-Watson estimator and k-nearest neighbour one. Properties of these estimators and possibilities of using them in practice are taken ...

    • Wpływ zarządzania ryzykiem finansowym na wartość firmy: analiza teoretycznych przesłanek wpływu zarządzania ryzykiem na wartość firmy 

      Bednarski, Robert; Baryś, Aleksander (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      The article discusses theoretical premises for the influence of financial risk management on firm’s value. Financial risk management presents a firm with the possibility of a reduction in the volatility of future earnings ...

    • Ewolucja regulacji prawnych w zakresie instytucji zbiorowego lokowania funkcjonujących w Europie 

      Antkiewicz, Sławomir (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      The article presents past and current challenges connected with legal regulations concerning European undertakings for collective investment. Introduced and planned changes were presented in this article. Particular ...

    • Wstęp 

      Unknown author (Wydawnictwo Uniwersytetu Łódzkiego, 2007)

    • Determinanty kompozycji rezerw walutowych - Euro w światowej strukturze rezerw 

      Bogołębska, Joanna (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      There are many determinants of currency composition of foreign reserves. The most important are: the currency pegs, the direction of trade, the currency of foreign debt, the liquidity and depth of financial markets. ...

    • Polska w ERM II - korzyści i zagrożenia 

      Bilski, Janusz (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      The purpose of this paper is to emphasize the role of accession polish zloty to ERM II. The paper provides the analysis of costs and benefits of participation zloty in exchange - rate mechanism. The Author investigate ...

    • Wzajemne zależności wzrostu gospodarczego i rozwoju systemu finansowego w Polsce - analiza symulacyjna 

      Dębski, Wiesław; Bujnowicz, Iwona (Wydawnictwo Uniwersytetu Łódzkiego, 2007)
      The interrelationships between the development of the financial system and the growth in the economy are the subject of the research of many authors. The research on these relations is being conducted both on theoretical ...