期刊名称：Petroleum-Gas University of Ploiesti Bulletin : Economic Sciences Series
印刷版ISSN：2284-8576
电子版ISSN：2247-8582
出版年度：2016
期号：1
语种：English
出版社：Petroleum-Gas University of Ploiesti
摘要：In this paper we propose a classification of the European Union countries,according to two indicators: number of agricultural holdings (NAH) and utilized agricultural area (UAA).The results obtained are important from the perspective of emphasizing the similarities and differences between European Union countries in relation to the specified indicators.Since the clustering methods usually used for discovering a structure in a data set have a tendency to "detect" clusters even in very homogeneous data set,a special attention was paid to the validation of the obtained results.For this reason,in order to validate the cluster structure obtained by applying hierarchical agglomerative clustering,three techniques were used to estimate the number of clusters,techniques which have led to the same result.In addition to this,we estimated the stability degree of the three clusters obtained.Our results show that one of the clusters has a reasonable stability and the other two have an exceptionally good stability.
