| 1. |
- Forsund, F. R., et al.
(författare)
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On the origins of data envelopment analysis
- 2002
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Ingår i: Journal of Productivity Analysis. - 0895-562X .- 1573-0441. ; 17:1-2, s. 23-40
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Tidskriftsartikel (refereegranskat)abstract
- The concept "Data Envelopment Analysis" (DEA) was introduced in the journal literature by the highly influential 1978 paper of Charnes, Cooper, and Rhodes. In the subsequent literature the development of research leading up to this paper tended to be forgotten. However, studying this diffusion of ideas may give valuable insights into research issues still unexplored and insight in the research process itself. A natural starting point is Farrell's seminal 1957 paper on concepts of efficiency and their computation. The richness of ideas presented in Farrell is demonstrated by the fact that the developments in the following two decades were based on aspects and ideas there. The origins of the main developments are identified, and the connections to Charnes, Cooper, and Rhodes are explored.
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| 2. |
- Kumbhakar, S. C., et al.
(författare)
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How fast do banks adjust? : A dynamic model of labor-use with an application to Swedish banks
- 2002
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Ingår i: Journal of Productivity Analysis. - 0895-562X .- 1573-0441. ; 18:1, s. 79-102
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Tidskriftsartikel (refereegranskat)abstract
- This paper deals with a dynamic adjustment process in which adjustment of a key variable input (labor) towards its desired level is modeled in a panel data context. The partial adjustment type model is extended to make the adjustment parameter both firm- and time-specific by specifying it as a function of firm- and time-specific variables. Desired level of labor use is represented by a labor requirement function, which is a function of outputs and other firm-specific variables. The catch-up factor is defined as the ratio of actual to desired level of employment. Productivity growth is then defined in terms of a shift in the desired level of labor use and the change in the catch-up factor. Swedish banking data is used as an application of the above model.
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| 3. |
- Försund, Finn R., et al.
(författare)
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Are all Scales Optimal in DEA? Theory and Empirical Evidence
- 2004
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Ingår i: Journal of Productivity Analysis. - 1573-0441. ; 21:1, s. 25-48
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Tidskriftsartikel (refereegranskat)abstract
- Policy recommendations concerning optimal scale of production units may have serious implications for the restructuring of a sector. The piecewise linear frontier production function framework (DEA) is becoming the most popular one for assessing not only technical efficiency of operations, but also for scale efficiency and calculation of optimal scale sizes. The main purpose of the present study is to investigate if neoclassical production theory gives any guidance as to the nature of scale properties in the DEA model, and empirically explore such properties. Theoretical results indicate that the DEA model may have more irregular properties than usually assumed in neoclassical production theory, concerning shape of optimal scale curves and the M-locus. The empirical results indicate that optimal scale may be found over almost the entire size variations in outputs and inputs, thus making policy recommendations about efficient scale difficult. It seems necessary to establish the nature of optimal scale before any practical conclusions can be drawn. Proposals for indexes characterizing the nature of optimal scale are provided.
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