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1

Clustered Approach to ICT Services Utilization Analysis

100%
Doucek P., Novotný O.
Organizacija
|
2012
|
vol. 45
|
issue 1
24-30
EN
The paper describes clustered approach to ICT services utilization analysis based on the WSA method. It allows extracting coherent groups of countries with nearly the same level of ICT services utilization based on the number of indicators analyzed. Approach is explained on case of the Czech Republic and its position in the European peloton with using available Eurostat data.
2
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Multicriteria rankings of open-end investment funds and their stability

75%
SIELSKA A.
Operations Research and Decisions
|
2010
|
vol. 20
|
issue 1
112-129
EN
For research purposes, three multicriteria outranking methods (PROMETHEE, WSA and TOPSIS) were used to construct rankings of investment funds to assess their performance in the time period from January to July 2008. Nine indicators related to the distributions of return rates, purchase and management costs and to customers’ convenience were included in the set of criteria. The weight of each criterion was calculated on the basis of the relative volatility rate of the given criterion. In order to assess the stability of the rankings, the weight of a single criterion was changed (using each criterion in turn) and new rankings were constructed using the modified weights. The similarity of rankings built before and after these changes was assessed on the basis of the maximum difference between ranks and the Spearman correlation coefficient. The results obtained enable assessment not only of the stability of each outranking method, but the similarity of results obtained by different methods as well. All calculations were done using the SANNA software.
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