Vaz, Clara B.Camanho, Ana2010-11-112010-11-112007Vaz, Clara B.; Camanho, Ana (2007). Comparison of two alternative store formats using a Malmquist-type index. In 22nd European Conference on Operational Research EURO XXII. Prague: University of Economicshttp://hdl.handle.net/10198/2788This paper explores the differences in performance between two groups of retailing stores that operate with different formats. The study described in this paper combines the use of a Malmquist-type index (in a static setting) with statistical tests. This index is decomposed into sub-indexes for comparing the efficiency spread between groups and the productivity differences between the best-practice frontiers of the groups. The hypothesis tests are used to verify if the differences between groups captured by the Malmquist-type index and its components are statistically significant.engData envelopment AnalysisMalmquist indexconference object