Seeking the causes of urban ruination: An empirical research in four Portuguese cities

摘要: Urban ruination is an understudied feature in the life of cities. This article discusses its causes. Based on study four shrinking Portuguese cities (Lisbon, Barreiro, Guimaraes and Vizela), using Multiple Linear Regression Analysis as statistical method, structure relationships among ruins, economic change, demographic social geography characteristics buildings are discussed. Although concludes that a highly contingent phenomenon, results show all structural factors, ageing obsolescence (poor housing conditions) key causes under study. Links between socio-spatial processes have also been identified.