Families of the Basque Country by the degree of relationships they maintain with family, friends and neighbors, according to the historical territory (%).

The study of social phenomena requires an integrated system of social indicators. The Survey of Living Conditions (ECV) provides comprehensive information about social habits, relationships and the physical and social environment in which the daily life of the population living in families takes place within the Basque Country. The five-year operation allows the development of internationally comparable indicators in each of the areas that shape people’s quality of life.社会现象研究亟需一套整合完善的社会指标体系。生活状况调查（Survey of Living Conditions，ECV）可针对巴斯克地区内的居家群体，全面采集其社会习惯、人际关系以及日常所处物质与社会环境相关信息。该五年期调查项目能够围绕影响民众生活质量的各领域，构建可进行国际比较的指标体系。