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Tytuł:
Segmentacja facebookowiczów - ujęcie ilościowe
Segmentation of Facebook users – quantification
Autorzy:
Czerska, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/419807.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
segmentation
Facebook users
Ward’s method
k-means method
segments profiling
Opis:
The purpose of this study is the statistical analysis of results of the online survey in order to make market segmentation of Facebook users. Non-random sampling methods were used: convenience sampling and snowball sampling method. Because the sample was not representative, it did not give rise to statistical inferences about the population of Facebook users. The survey results were only part of the initial diagnosis, a description of the existing state of affairs. On the basis of selected market segmentation criteria and using the generalized k-means clustering algorithm and the Ward agglomeration method three clusters were formed: “Informed over-cautious persons” (56,31% of the sample), “Committed risktakers” (20,39% of the sample) and “Persistent assertive people” (23,30% of the sample). Segments were profiled on the basis of psychographic and behavioral criteria. The statistical significance of the relationship between clusters of Internet users and individual variables was confirmed by the chi-square test.
Źródło:
Nauki o Zarządzaniu; 2015, 3 (24); 33-40
2080-6000
Pojawia się w:
Nauki o Zarządzaniu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regional variety in quality of life in Poland
Autorzy:
Nowak, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/18859984.pdf
Data publikacji:
2018
Wydawca:
Instytut Badań Gospodarczych
Tematy:
quality of life
welfare measures
regional variety
Hellwig’s method
Ward’s method
Opis:
Research background: Quality of life is viewed as the degree of people's satisfaction of various needs, especially including material, spiritual, safety-related needs and life aspirations. The aspects taken into consideration are economic, spatial, environmental and cultural ones. Quality of life is therefore determined by various conditions in which a human lives and the source of which is the hierarchy of needs and a value system. At the same time, quality of life can be viewed in terms of collectivity (objective aspect) and an individual's evaluation (subjective aspect). The former view shapes the existing living conditions and the latter results from the satisfaction from a specific person's life, experiences and ambitions. The multidimensionality of the quality of life categories translates into difficulties in defining and measuring it, and constitutes an interesting research object. Purpose of the article: The purpose of the article is to diagnose and evaluate the variety of the quality of life in Polish voivodeships, in objective terms by building a synthetic measure allowing for estimating inequalities in the quality of life of regional communities. It was assumed that quality of life will be characterised by indicators grouped into the following areas: material living conditions, economic activity, health, education and living environment quality. Methods: The main method used for measuring quality of life is the linear ordering based on Z. Hellwig's taxonomic measure which allows for organising voivodeships in terms of the quality of life of communities. Additionally, the cluster analysis (Ward's agglomerative grouping method) was used, which allowed for distinguishing voivodeships similar in terms of the analysed phenomenon. Findings & Value added: During the realisation of the research goal, special attention was paid to the complexity of the quality of life issue and its measurement in terms of economy and rather important varieties in voivodeships were emphasized. The conducted analysis allowed for distinguishing groups of regions with the highest, high, low and the lowest quality of life.
Źródło:
Oeconomia Copernicana; 2018, 9, 3; 381-401
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BARRIERS TO THE INNOVATION OF THE FOOD INDUSTRY IN THE EUROPEAN UNION MEMBER COUNTRIES
Autorzy:
Łukiewska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1818422.pdf
Data publikacji:
2020-01-21
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
food industry
innovation
barrier
Ward’s method
European Union
Opis:
In conditions of increased competition, development of biotechnology and the ever growing demands of the consumers, innovations are becoming an important factor of competitiveness in the food industry. The aim of the conducted research was to evaluate the barriers of innovativeness in the food industry based on chosen European Union countries during 2014-2016. Based on research of CIS-2016 carried out in accordance with the Oslo methodology developed by OECD, the barriers of innovativeness within the food industry enterprises which were active and non-active were analyzed. As for the evaluation of the analyzed factors within the countries of the EU, descriptive statistics and Ward’s method, which is an agglomeration form of grouping method, were used. From the conducted research, it followed, that the representations of innovative active enterprises more often reported on the barriers which were impeding the introduction of innovations. The most common which were reported included big competition, lack of internal funding and high costs. Representatives of inactive innovative enterprises were reporting low demand on the market, lack of internal funding and high costs.
Źródło:
Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach; 2019, 49, 122; 23-33
2082-5501
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial differentiation in the social and economic development level in Poland
Autorzy:
Miłek, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/22446539.pdf
Data publikacji:
2018
Wydawca:
Instytut Badań Gospodarczych
Tematy:
region
regional development
regional differentiation
Hellwig’s method
Ward’s method
natural breaks classification
Opis:
Research background: Social and economic development involves a broad spectrum of social, economic and spatial phenomena. The multi-faceted nature of regional development arises directly from the fact that it is shaped by multiple factors. Current discourse emphasises the role of endogenous factors, which indicate the specific nature and the distinctive features of the given territory. Mobilising the endogenous potential ensures stable regional development dynamics. At the moment, one of the fundamental economic problems are the increasing differences in the development of specific regions. Purpose of the article: The purpose of this study is to assess the differentiation of the social and economic level development of Polish Voivodeships, applying the selected assessment methods for the years 2010 and 2015, draw up a rank list of regional units according to their development levels, and identify the groups of Voivodeships sharing similar development levels. The indicators used in this study, characterising the level of the social and economic development, have been systematised according to the following areas: demographics and labour market, regional entrepreneurship, local economy structure, innovation and research & development activities, technical infrastructure, social infrastructure, and the condition and protection of the natural environment. Methods: The level of the social and economic development of Polish Voivodeships was assessed using Zdzisław Hellwig's development pattern method, which made it possible to rank them according to the level of development of Polish Voivodeship. The methodology is supplemented by Ward's agglomerative clustering method, which made it possible to distinguish other Voivodeships according to the analysed phenomenon. The Voivodeship clustering method used Jenks' natural breaks classification method. Findings & Value added: Pursuing the research aims, the authors focused in particular on clear spatial differences. Through the analysis we were able to identify the changes in the social and economic development processes of the Polish regions. The Voivodeships were divided into groups according to their development level: the highest, high, low and the lowest.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2018, 13, 3; 487-507
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cooperation of enterprises in innovative activities on the example of Polish regions
Autorzy:
Nowak, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/22444298.pdf
Data publikacji:
2021
Wydawca:
Instytut Badań Gospodarczych
Tematy:
innovation activities
cluster analysis
cooperation of enterprises
Polish voivodeships
regional differentiation
Ward’s method
Opis:
Research background: Cooperation is an indispensable element of innovation activities of enterprises. Undertakings in innovation, by nature, require not only significant expenditures or creative human capital, but also cooperation with other enterprises, scientific institutions, and the business environment. Cooperating companies have a greater chance to compete in the international arena while building the innovative potential of the regional environment. Stimulating the permanent cooperation of enterprises operating in the region, in its various forms, is a key challenge for central government authorities, local government authorities, and other actors in social and economic life. The existing literature on the cooperation of enterprises focuses on the motives of cooperation and their effects, but to a lesser extent on the spatial similarity of these processes, i.e. in individual regions of the country. Purpose of the article: The purpose of the article is to diagnose and evaluate regional differences in the level of cooperation between companies conducting innovation activities in Poland. The study used data on innovation activities published by Statistics Poland and data on enterprises participating in cluster cooperation published by the Polish Agency for Enterprise Development. Methods: The cluster analysis was used, allowing to identify voivodeships that are similar to each other in terms of the analyzed phenomenon. The spatial classification of voivodeships was performed using the Ward method, which is classified as hierarchical and is often used to group objects. The result is a hierarchical tree that groups the regions in increasingly larger clusters. Findings & value added: The results indicate a low level of cooperation and the existence of significant differences in the cooperation of enterprises as part of innovation activities in Polish regions. The low level of cooperation between companies in individual regions corresponds to the number of marketed innovations. There are similarities between some regions in terms of cooperation on innovation activities. The results of the analysis may provide an indication for national and European Union economic policy entities in the field of creating instruments to support the cooperation of companies on innovation activities.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2021, 16, 4; 839-857
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cluster analysis of effectiveness of labour market policy in the European Union
Autorzy:
Rollnik-Sadowska, Ewa
Dąbrowska, Edyta
Powiązania:
https://bibliotekanauki.pl/articles/18800477.pdf
Data publikacji:
2018
Wydawca:
Instytut Badań Gospodarczych
Tematy:
labour market policy expenditure
effectiveness
efficiency
Ward’s method
k-means method
Opis:
Research background: In the era of demographic changes and the need for rationalization of public expenditure, the European Union social policy promotes the activation approach. In addition, a growing importance of increasing the effectiveness and efficiency of public entities can be noticed. These phenomena are visible in the implementation of the labour market policy. However, the EU countries represent a different approach to spending public funds on issues related to the implementation of  labour market policy. Purpose of the article: The authors are presenting the main theoretical assumptions concerning effectiveness and efficiency of labour market policy. Moreover, in the paper the EU countries are classified in clusters according to their level of expenditure on different categories of LMP. A comparison of the situation over ten years - in 2004 and 2014 - has also been conducted. In 2004, ten new members entered the EU, and the year 2014 presents the most current data in the analyzed area. Methods: As a research method cluster analysis was applied. Cross-country labour market situation throughout the EU is presented by the analysis of the Eurostat data. The countries are grouped in clusters following Ward's and k-means methods. Findings & Value added: There is a need to work out a complex evaluation of labour market policies in the EU to provide comparative analysis of the EU countries (or groups of countries). It would allow to determine the level of development of the country in terms of the efficiency of labour market policies. The EU countries with the best labour market indicators represent diverse levels of LMP expenditure.
Źródło:
Oeconomia Copernicana; 2018, 9, 1; 143-158
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikacja wzorców konsumpcji żywności w Polsce
IDENTIFICATION OF FOOD CONSUMPTION PATTERNS IN POLAND
Autorzy:
Kwasek, Mariola
Powiązania:
https://bibliotekanauki.pl/articles/898040.pdf
Data publikacji:
2015
Wydawca:
Kujawsko-Pomorska Szkoła Wyższa w Bydgoszczy
Tematy:
spożycie żywności
gospodarstwa domowe
analiza skupień
metoda Warda
food consumption
households
cluster analysis
Ward’s method
Opis:
Celem artykułu jest identyfikacja i charakterystyka wzorców konsumpcji żywności w Polsce. Gospodarstwa domowe w Polsce są bardzo zróżnicowane pod względem poziomu i struktury spożycia żywności. Wynika to zarówno z czynników ekonomicznych, jak i pozaekonomicznych. Znaczący wpływ na kształtowanie wzorców konsumpcji żywności mają także zalecenia żywieniowe prowadzące do racjonalnego (prozdrowotnego) żywienia. Narzędziem umożliwiającym identyfikację wzorców konsumpcji żywności są metody taksonomiczne, w tym analiza skupień. W badaniu uwzględniono siedem grup społeczno‑ekonomicznych gospodarstw domowych w Polsce, tj. cztery zlokalizowane na obszarach wiejskich: pracownicy, rolnicy, osoby pracujące na własny rachunek, emeryci i renciści oraz trzy zlokalizowane w mieście: pracownicy, osoby pracujące na własny rachunek oraz emeryci i renciści. Grupowanie wiejskich i miejskich gospodarstw domowych według wzorców konsumpcji żywności przeprowadzono hierarchiczną aglomeracyjną metodą Warda. Każdą grupę ludności scharakteryzowano za pomocą trzydziestu dwóch zmiennych diagnostycznych. Na podstawie przeprowadzonego badania wyodrębniono cztery skupienia i dwa różne wzorce konsumpcji żywności: miejski wzorzec konsumpcji żywności oraz wiejski wzorzec konsumpcji żywności.
The aim of the article is to identify and characterize the patterns of food consumption in Poland. The Author analyses food consumption in Poland on the basis of CSO’s household budget surveys. Households in Poland are very diversi fied in their level and structure of food consumption. This results from both economic and non-economic factors. Significant impact on the shaping of food consumption patterns has been observed in the case of dietary recommendations promoting rational (healthy) nutrition. Taxonomic methods, including cluster analysis serve as a main tool, which allows the identification of food consumption patterns. The study included seven socio-economic groups of households in Poland, i.e. four located in rural areas: employees, farmers, the self-employed, retirees and pensioners and three located in city: employees, the self-employed, and retirees and pensioners. Grouping of urban and rural households according to food consumption patterns was carried out using Ward’s hierarchical agglomeration method. Each population group was characterized by 32 diagnostic variables. As a result of this grouping, four clusters were identified. Each of these clusters was characterized by a different level and structure of food consumption, while the households belonging to the same cluster had a similar food consumption profile. In those four clusters two different food consumption patterns were identified: urban pattern of food consumption and rural pattern of food consumption.
Źródło:
Roczniki Ekonomiczne Kujawsko-Pomorskiej Szkoły Wyższej w Bydgoszczy; 2015, 8; 90-117
1899-9573
Pojawia się w:
Roczniki Ekonomiczne Kujawsko-Pomorskiej Szkoły Wyższej w Bydgoszczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena podobieństwa struktury towarowej handlu zagranicznego w krajach Unii Europejskiej
Autorzy:
Salamaga, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/543573.pdf
Data publikacji:
2017
Wydawca:
Główny Urząd Statystyczny
Tematy:
index of structure similarity
foreign trade
cluster analysis
Ward’s method
wskaźnik podobieństwa struktur
handel zagraniczny
analiza skupień
metoda Warda
Opis:
An important element of the foreign trade research is an analysis of its commodity and geographical structure. A method of examining the similarity of foreign trade structure was proposed in this article and applied on the example of certain EU countries. The aim of this article is to assess the degree of similarity of foreign trade structures and to indicate the extent to which it reflects differences in economic development. The study was conducted with the use of an original indicator of commodity structure similarity and a hierarchical cluster analysis for the period 2006— —2015. It enabled to identify the most similar countries in terms of foreign trade structure. Data for the computations were obtained from the Eurostat. The obtained results proved that countries with similar economic potential have a similar foreign trade structure.
Ważnym elementem badania handlu zagranicznego jest analiza jego struktury w układzie towarowym i geograficznym. W artykule zaproponowano metodę badania podobieństwa struktury handlu zagranicznego i zastosowano ją na przykładzie wybranych krajów Unii Europejskiej (UE). Opracowanie ma na celu ocenę stopnia podobieństwa struktur handlu zagranicznego oraz wskazanie, na ile odzwierciedla on różnice w rozwoju gospodarczym. Badanie przeprowadzono za pomocą autorskiego wskaźnika podobieństwa struktury towarowej oraz hierarchicznej analizy skupień dla okresu 2006—2015. Umożliwiło to wyodrębnienie krajów najbardziej podobnych pod względem struktury handlu zagranicznego. Dane do obliczeń uzyskano z Eurostatu. Otrzymane wyniki dowiodły, że kraje o podobnym potencjale gospodarczym charakteryzują się zbliżoną strukturą handlu zagranicznego.
Źródło:
Wiadomości Statystyczne. The Polish Statistician; 2017, 11
0043-518X
Pojawia się w:
Wiadomości Statystyczne. The Polish Statistician
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of changes in the labour markets of post-communist countries with other EU member states
Autorzy:
Dmytrów, Krzysztof
Bieszk-Stolorz, Beata
Powiązania:
https://bibliotekanauki.pl/articles/22444312.pdf
Data publikacji:
2021
Wydawca:
Instytut Badań Gospodarczych
Tematy:
European labour market
linear ordering
Dynamic Time Warping
Ward’s method
cluster analysis
Opis:
Since 2004, 11 post-communist countries joined the EU. It has helped to strengthen their international competitiveness. This was linked to the implementation of institutional and economic reforms, significant technological changes and improvements in the quality of human capital, as well as fiscal stabilisation policies. These changes affected their situation in the labour market. Purpose of the article: The aim of the study is to assess changes in the situation in the labour market in the EU with particular emphasis on the post-communist countries in the period 2002? 2019. Methods: The situation of countries in the European labour market was estimated using the TOPSIS method. A similarity matrix of changes in the composite variable for each country was then constructed using the Dynamic Time Warping method. On its basis, homogeneous clusters of countries were determined using the Ward's method. Findings & value added: Four homogenous clusters of countries were formed. The post-communist ones belonged to two groups. In one, there were two countries ? Croatia and Slovakia. The rest of the post-communist countries were in a large cluster, which also included Germany, Malta, Finland, Portugal, France and Belgium. Changes of the situation in the post-communist countries in this group improved very much during the analysed period (this was particularly evident for Czechia, Estonia and Poland). It is interesting to investigate whether the reaction of labour markets to changes in the global economic situation in post-communist countries is similar to that in the old EU countries. The similarity of changes can be measured using the DTW method. There is an empirical research gap in this respect. Therefore, the added value is the use of this method in assessing similarities of changes in the labour market situation in post-communist countries in comparison to the Western European ones.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2021, 16, 4; 741-764
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regional differences in the pro-ecological measures of the 2007-2013 RDP in Poland
Autorzy:
Polna, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/96571.pdf
Data publikacji:
2019
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
less-favoured areas
agri-environmental programme
land afforestation
Ward’s method
obszar mniej uprzywilejowany
program rolnośrodowiskowy
zalesianie gruntów
metoda Warda
Opis:
The article deals with regional differences in the use of the EU funds allocated to pro-ecological measures in Poland. The research covers support for land management in mountain areas and other less-favoured areas (LFAs), agri-environmental programme, afforestation of agricultural and non-agricultural land implemented under the 2007-2013 Rural Development Programme. The analysis was made by voivodeships on the basis of data from the Agency for the Restructuring and Modernisation of Agriculture and Statistics Poland. Ward’s method was used for the division of voivodeships into groups with similar intensity of absorption of funds from pro-ecological measures. Three groups of voivodeships, most similar internally and with the largest differences between them were selected. It has been stated that the highest level of use of RDP funds concerned the voivodeships of northern and western Poland, while their lowest use was in the voivodeships of the south-eastern part of the country and in Łódź.
Źródło:
Ekonomia i Środowisko; 2019, 3; 168-179
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Territorial diversity of availability of public services in Poland
Autorzy:
Miłek, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/1918646.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
public services
availability of public services
Hellwig’s method
Ward’s method
regional diversities
usługi publiczne
dostępność usług publicznych
metoda Hellwiga
metoda Warda
zróżnicowanie regionalne
Opis:
Purpose: The nature of contemporary development processes determines the development of the area of public services, which is related to the distribution of these services and is of interest to public sector economics. The state’s key commitment to its citizens is to guarantee adequate availability of public services. It is an important issue that determines the quality of life of the citizens and determines the level of social and economic development of territorial units. The aim of this paper is to analyze and evaluate inequalities in access to selected public services in Poland from a regional perspective. Design/methodology/approach: To assess the level of availability of selected public services in Poland, Hellwig’s synthetic indicator was used, which made it possible to indicate the ranking of voivodeships in terms of availability of public services. The research is complemented by the Ward’s clustering method, which was used to identify clusters of territorial units with a similar level of availability of the analyzed services. The research used data made available by the Statistics Poland (GUS), including the Local Data Bank and statistical studies: Use of information and communication technologies in 2014 (orig. title: Wykorzystanie technologii informacyjno-telekomunikacyjnych w 2014 roku) and Use of information and communication technologies in 2018 (orig. title: Wykorzystanie technologii informacyjno-telekomunikacyjnych w 2018 roku). The analysis concerns the years 2014 and 2018. Findings: Regions of Poland are characterized by a diverse level of availability of public services. The analysis allowed to identify the regions with the highest, high, low and very low level of availability of public services. The distance between the highest and the lowest ranked voivodeships indicates quite significant territorial inequalities in access to public services, although it has slightly decreased throughout the analyzed years. Social implications: The study of availability of public services is an important component of the assessment of the level of social and economic development of territorial units and the standard of living of local communities. Therefore, it is justified to determine the essence of spatial diversity of the level of availability of public services, which play an important role in shaping the level of social and economic development of territorial units and influence the implementation of development priorities of the country and the European Union. The development of public services requires identifying existing barriers in the area of public governance as well as possibilities for their improvement and then proposing a set of instruments to improve the service management process. Originality/value: The results of the research can be used in the process of management of public services by public administration units in the context of increasing the universal availability of these services and improving their quality. The results of the analysis may provide a source of knowledge for both national and regional economic policy actors as well as European Union decision-making bodies in the area of public support to improve the availability of public services in the next development programming perspectives.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2020, 146; 275-294
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie strategii portfelowych do inwestycji w waluty kryptograficzne
Application of the portfolio strategy to the investments in the cryptocurrencies
Autorzy:
Kądziołka, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/449766.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorska Szkoła Biznesu w Szczecinie
Tematy:
waluty kryptograficzne
ryzyko
portfel kryptowalut
strategia MVP
metoda Warda
cryptocurrencies
risk
portfolio analysis
MVP strategy
Ward’s method
Opis:
Celem artykułu jest przedstawienie możliwości wykorzystania strategii portfelowych do inwestycji w waluty kryptograficzne. Szczególna uwaga została zwrócona na problem doboru walut kryptograficznych do portfela. Do redukcji liczby kryptowalut charakteryzujących się silnym dodatnim skorelowaniem stóp zwrotu zaproponowano wykorzystanie metody Warda. Następnie rozważano różne metody wyboru reprezentantów podgrup (uzyskanych metodą Warda) początkowego zbioru walut kryptograficznych. Wybrani reprezentanci (kryptowaluty) tworzyły portfel, którego skład optymalizowano z wykorzystaniem strategii MVP. Redukcja początkowej liczby składników portfela może prowadzić do uzyskania większej stopy zwrotu, jednak portfele o mniejszej liczbie składników obarczone były większym ryzykiem.
The aim of the article is to present the possibilities of using the portfolio strategy to the investments in the cryptocurrencies. Particular attention was paid to the problem of selection of the cryptocurrencies. There was proposed to use the Ward's method to reduce the number of cryptocurrencies characterized by strong positive correlation of the rate of returns. Then there were considered various methods of choice representatives of subgroups of the initial set of cryptocurrencies. Selected representatives (cryptocurrencies) formed portfolio. Weights of the portfolio were optimized using MVP strategy. Reducing the number of initial components of the portfolio could lead to a greater rate of return, but portfolios with reduced number of components are characterized by greater risk.
Źródło:
Zeszyty Naukowe ZPSB Firma i Rynek; 2017, 1(51); 107-116
2657-3245
Pojawia się w:
Zeszyty Naukowe ZPSB Firma i Rynek
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielowymiarowa analiza porównawcza jako narzędzie oceny spółek deweloperskich notowanych na GPW
Multivariate comparative analysis as a toolto evaluate the development of companies listed on the Warsaw Stock Exchange
Autorzy:
Chrzanowska, Mariola
Zielińska-Sitkiewicz, Monika
Powiązania:
https://bibliotekanauki.pl/articles/425133.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
Ward’s method
k-means method
Polish developer companies
Opis:
The diversity and multiplicity of information associated with investment in the stock market can cause problems with the proper understanding of the analyzed phenomena. In particular it refers to small investors who invest directly in stocks. Therefore, evaluating the financial condition of listed companies is very important, hence the need to use methods that will simplify and thus make stock market analysis easier. This paper presents an attempt to apply the selected financial ratios for the classification of 17 real estate companies listed on the Warsaw Stock Exchange into groups characterized by a similar economic condition. In the study multidimensional comparative analysis was used, i.e. Ward’s method and the method of k-means. The analysis was carried out in the period 2010-2012. In the experiment it was proved that using Ward’s method could identify companies with the weakest condition.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 4(42); 60-71
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena poziomu zagrożenia terroryzmem w krajach Unii Europejskiej z wykorzystaniem GTI
Assessment of the terrorism threat level in European Union countries using the GTI index
Autorzy:
Kądziołka, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/646240.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
terroryzm
GTI
metoda Warda
Unia Europejska
terrorism
Global Terrorism Index
Ward’s method
European Union
Opis:
The purpose of the article is to present the method of constructing the GTI index used for a multidimensional assessment of a terrorist threat. Next, using Ward’s method, groups of EU countries similar in terms of the terrorism threat level will be identified. Particular attention was paid to the position of Poland, which due to its active participation in military operations in Afghanistan and Iraq, may be the target of a terrorist attack. The analyses show that Poland is in the group of countries with the lowest terrorism threat level. However, this threat cannot be underestimated.
Celem artykułu była prezentacja sposobu konstruowania miernika GTI wykorzystywanego do wielowymiarowej oceny zagrożenia terroryzmem. Następnie przy użyciu metody Warda zidentyfikowano grupę krajów UE podobnych pod względem zagrożenia terroryzmem. Szczególną uwagę zwrócono na pozycję Polski, która z powodu aktywnego udziału w działaniach militarnych w Afganistanie i Iraku czy rozmieszczenia wojsk amerykańskich może być celem ataku terrorystycznego. Z przeprowadzonych analiz wynika, że Polska znajduje się w grupie krajów o najmniejszym zagrożeniu terroryzmem, jednak zagrożenia tego nie można lekceważyć.
Źródło:
Ekonomia Międzynarodowa; 2018, 23
2082-4440
2300-6005
Pojawia się w:
Ekonomia Międzynarodowa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena homogeniczności regionów w Polsce z punktu widzenia struktury wieku ludności
The evaluation of homogeneity within Polish regions in terms of population age structure
Autorzy:
Majdzińska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2028312.pdf
Data publikacji:
2021-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
struktura wieku populacji
klasyfikacja
metoda Warda
region
demografia
population structure by age
procedure classification
Ward’s method
demography
Opis:
Miasta, zwłaszcza te pełniące funkcję stolicy województwa, stanowią istotny element każdego regionu, zarówno pod względem gospodarczym, społecznym, jak i demografia siła ich polaryzacyjnego oddziaływania często sięga poza administracyjne granice regionu. Celem opracowania jest ocena homogeniczności (lub dywergencji) województw z punktu widzenia struktury wieku populacji, a także ocena stopnia podobieństwa struktury wieku populacji zamieszkującej powiaty do tejże struktury mieszkańców stolic wojewódzkich. Analizy poprzedzone zostały charakterystyką województw Polski oraz ich stolic w latach 2002 i 2018 z punktu widzenia struktury wieku ludności, ze szczególnym uwzględnieniem procesu starzenia się populacji. Następnie dla danych z 2018 r., przy wykorzystaniu metody Warda, przeprowadzona została klasyfikacja powiatów leżących w granicach województw których stolicami są największe pod względem liczby mieszkańców miasta oraz województw Polski Wschodniej. Dokonano też oceny podobieństwa powiatów leżących na obszarze wymienionych województw do ich stolic pod względem struktury wieku ludności w 2018 r. Uzyskane rezultaty wykazały większą homogeniczność regionów Polski Wschodniej pod względem podobieństwa powiatów leżących w ich granicach do stolic poszczególnych województw z punktu widzenia struktury wieku ludności, niż regiony których stolicami są największe pod względem liczby ludności miasta.
Cities, especially capitals of voivodeships, constitute an important element of each region in economic, social, and demographic terms. A big city functions as a growth centre, influencing the environment at various levels. However, the strength of their polarizing influence often reaches beyond the respective administrative boundaries. Urbanization and suburbanization significantly affect the course of population processes. Poland is differentiated territorially by the age structure of the population. This is visible both at the voivodeship level and within these administrative units. For several decades, the progress of the population aging process has been observed – especially in cities, which are characterized by a higher advancement of demographic old age. The paper aims to evaluate the degree of the homogeneity (or heterogeneity) of Polish voivodships in terms of the population age structure. First, as an introduction to the main analysis, a demographic description of Polish voivodships (understood also as regions) was conducted, including with their capital cities in the year 2002 and 2018. The description incorporates age structures with particular emphasis on the aging process of the population. Within each region the classification procedure was conducted (Ward’s method was used), but only the results for voivodships with the most populated capitals and voivodships located in the eastern part of Poland were presented. It was also attempted to evaluate the similarity between regions and their central cities with respect to the age structure of the population. GUS publications served as the source of the data analysis. The obtained results showed that Polish voivodships vary in terms of the population age structure. In this matter, compared to all poviats in a given region, cities stand out (especially large ones). In most of the analyzed regions, the population age structure of their capitals differs from the one of poviats located within these voivodships. Those differences are much greater in the case of large cities. Eastern Polish regions have greater homogeneity (in terms of similarities between their poviats and the capitals of individual voivodeships regarding the population age structure) than the regions with capitals of the highest population. Eastern Poland’s voivodship capitals have a lower economic, demographic, and social impact on rest of the region than large cities. Among the analyzed cities, Warsaw is characterized by a particular difference in the population age structure, both in comparison with the poviats of the Mazowieckie voivodship and with other voivodship capitals.
Źródło:
Space – Society – Economy; 2021, 32; 131-151
1733-3180
2451-3547
Pojawia się w:
Space – Society – Economy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

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