This paper calls attention to the implications of using cost or revenue data in efficiency measurement through Data Envelopment Analysis (DEA). In many empirical settings this issue arises, since frequently input and/or output quantities or prices are not available, and only value measures are...

This paper describes a performance analysis of Portuguese secondary schools using data envelopment analysis (DEA). The type of assessment carried out in schools may be different depending on the perspective. Therefore we adopted in this paper two perspectives for assessing schools: a society...