Suchergebnisse

Abstract

Research background: The multidimensional assessment of the attractiveness of cryptocurrency exchanges seems to be an important issue, because the risk of the collapse of such an exchange or its use for illegal purposes is higher than in the case of traditional exchanges.

Purpose: The aim of the work is to create ranking and identify groups of cryptocurrency exchanges with a similar level of attractiveness.

Research methodology: 13 different composite indicators were considered. Finally, one of them was chosen as a representative according to the similarity of the obtained rankings. Clustering methods were used to identify groups of exchanges with a similar level of the constructed measure.

Result: The best according to the adopted criteria of rankings similarity was the taxonomic measure constructed using the standardized sum method with equal weights. Combining hierarchical clustering with the k-means algorithm allowed to improve the quality of clustering measured with the silhouette index.

Novelty: The originality of the paper lies in the use of different methods of a multidimensional comparative analysis on the cryptocurrency market.

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.