When the city develops to a certain extent, the city will have some problem of aging. In order to solve this problem, the governments carry out "urban renewal" policies to cope with it. Urban renewal makes the urban land to reuse with the urban planning, the urban function to recovery, the life to improve, and to raise the public Interest. The Taiwan Government has published the “Urban Renewal Act” and “Bulk Reward for Urban Renewal” since 1998 to promote the urban renewal policies and civil participation. Taipei, though, is the earliest and the most experienced city in Taiwan which has already conducted 221 urban renewal projects so far, neither the projects themselves can present the specific interests created nor the government can assess the effectiveness of them. In recent years, a Data Envelopment Analysis (DEA) method is widely used in various fields. Because the process of urban renewal involves a variety of input and output factors, the relationship between them can be regarded as a major project for performance assessment. This study, therefore, categorizes the urban renewal projects in Taipei City as a decision making unit. The influential factors were further determined and divided into environmental, economic and social dimensions. Following this, the DEA method was used to evaluate the efficiency of urban renewal projects. Finally the outcomes of evaluation can be used as an approach for government and developers to propose an efficient urban renewal project.
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