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Malmquist indexes using a geometric distance function (GDF)
Portela, Maria Conceição A. S.; Thanassoulls, EmmanuelTraditional approaches to calculate anal factor pmthwtivity change through Malmquist indexes rely on distance fin chaos. In this paper we show that the use of distance Junctions as a means to calculate total factor productivity change 'nth, introduce some bias in the analysis. and tnerefire tee propose a procedure that calculates total factor productivity change through observed values only. Our total factor pr...
Efficient and close targets in data envelopment analysis (DEA)
Portela, Maria Conceição A. S.; Borges, Pedro Castro; Thanassoulis, EmmanuelThis paper draws attention for the fact that traditional Data Envelopment Analysis (DEA) models do not provide the closest possible targets (or peers) to inefficient units, and presents a procedure to obtain such targets. It focuses on non-oriented efficiency measures both measured in relation to a Free Disposal Hull (FDH) technology and in relation to a convex technology. The approaches developed for finding c...
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