@techreport{Krivonozhko2010note,
abstract = {A new DEA model has been introduced recently combining the primal and the dual models in order to impose strong complementary slackness conditions. It was claimed that a reference set that contains the maximum number of efficient units can then be determined. The model is very interesting as a theoretical idea. However, not only does the computational burden increase significantly, but it seems also that the basic matrices may be inherently ill-conditioned, leading to wrong results. Numerical experiments have been carried out on two real datasets of medium size with 163 and 920 units. These experiments show pervasive existence of ill-conditioned matrices leading to obviously wrong estimates of efficiency scores, and units declared as efficient reference units while actually being inefficient.},
address = {Oslo},
author = {Vladimir Krivonozhko and Finn R. F\o{}rsund and Andrey V. Lychev},
copyright = {http://www.econstor.eu/dspace/Nutzungsbedingungen},
keywords = {C61; D20; 330; Data envelopment analysis; BCC model; DEA/SCSC model; strong complementary slackness conditions},
language = {eng},
number = {2010,17},
publisher = {Dep. of Economics, Univ. of Oslo},
title = {A note on imposing strong complementary in DEA},
type = {Memorandum // Department of Economics, University of Oslo},
url = {http://hdl.handle.net/10419/47286},
year = {2010}
}
