Przeglądaj Acta Universitatis Lodziensis. Folia Oeconomica nr 337(4)/2018 według tytułu
Wyświetlanie pozycji 8-14 z 14
-
Nonlinear Principal Component Analysis for Geographically Weighted Temporal‑spatial Data
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)Schölkopf, Smola and Müller (1998) have proposed a nonlinear principal component analysis (NPCA) for fixed vector data. In this paper, we propose an extension of the aforementioned analysis to temporal‑spatial data and ... -
Outliers vs Robustness in Nonparametric Methods of Regression
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)The article addresses the question of how robust methods of regression are against outliers in a given data set. In the first part, we presented the selected methods used to detect outliers. Then, we tested the robustness ... -
The Role of Housing in the Spatial Distribution of Unemployment in Poland
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)Labour market and housing problems are an important part of social studies, though spatial analysis of labour market diversification and housing resources are not the dominating subject of studies. The interaction between ... -
Should Investors in Commodity Markets Be Superstitious (Based on the Example of 29 Commodities)?
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)The issue of efficiency of financial markets has always fascinated scientists. It is significant from the point of view of assessing portfolio management effectiveness and behavioural finance. In the first part of this ... -
Spatio‑temporal Modelling of the Influence of the Number of Business Entities in Selected Urban Centres on Unemployment in the Kujawsko‑Pomorskie Voivodeship
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)The paper presents the analysis of the spatial and spatio‑temporal tendencies and dependence in matters related to the situation in the labour market of the Kujawsko‑Pomorskie Voivodeship across municipalities in the period ... -
Wpływ liberalizacji usług w Unii Europejskiej na innowacyjność i konkurencyjność polskich przedsiębiorstw usługowych. Wyniki badań
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)The article presents results of research about Polish services companies. It has been conducted to assess the impact that services liberalization on the EU market has on competitiveness and innovativeness of Polish services ... -
Zastosowanie filtru Kalmana do modeli stochastycznej zmienności typu Ornsteina‑Uhlenbecka
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)Barndorff‑Nielsen and Shephard (2001) proposed a class of stochastic volatility models in which the volatility process is the Ornstein‑Uhlenbeck process driven by a Levy process without gaussian component. Parameter ...