Abstract
As student numbers in higher education in the UK have expanded during recent years, it has become increasingly important to understand its cost structure. This study applies Data Envelopment Analysis (DEA) to higher education institutions in England to assess their cost structure, efficiency and productivity. The paper complements an earlier study that used parametric methods to analyse the same panel data. Interestingly, DEA provides estimates of subject-specific unit costs that are in the same ballpark as those provided by the parametric methods. The paper then extends the previous analysis and finds that further student number increases of the order of 20–27% are feasible through exploiting operating and scale efficiency gains and also adjusting student mix. Finally the paper uses a Malmquist index approach to assess productivity change in the UK higher education. The results reveal that for a majority of institutions productivity has actually decreased during the study period.
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This paper draws on research carried out on behalf of the UK Department for Education and Skills, now Department for Innovation, Universities and Skills, DIUS. The views expressed in the paper are those of the authors and no representation is being made that they are necessarily shared by the DIUS.
Appendix
Appendix
Mathematical presentation of DEA under VRS and CRS
The original DEA model of Charnes et al (1978) assumes constant returns to scale (CRS) under which the DEA-derived input- and output-oriented measures of efficiency for DMU are identical. The CRS assumption can be relaxed and the DEA model can be easily modified to incorporate variable returns to scale (VRS) (Banker et al, 1984). The set of DMUs identified as inefficient under VRS will be the same whether an input- or output-oriented approach is taken. In contrast to the CRS framework, however, the actual values of the efficiency scores for the inefficient DMUs vary with the orientation adopted.
In practice, DMUs may produce many outputs from their resources, in which case programming techniques have to be used to identify the piecewise linear frontier joining up all efficient DMUs. Suppose DMUs use m inputs to produce s outputs. Under VRS the following linear programming problem must be solved for each of the n DMUs (k=1, …, n):
Overall efficiency of DMU k is measured by E k =1/φ k in the output-oriented framework or E k =θ k in the input-oriented framework. Further, scale efficiency can be identified by calculating the following ratio for DMU k:
where the numerator and denominator include efficiency scores calculated under CRS and VRS, respectively. Note that the CRS efficiency score can be calculated simply by deleting the constraint Σ j=1 n λ j =1 from model 1 (A.1) or (A.2).
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Thanassoulis, E., Kortelainen, M., Johnes, G. et al. Costs and efficiency of higher education institutions in England: a DEA analysis. J Oper Res Soc 62, 1282–1297 (2011). https://doi.org/10.1057/jors.2010.68
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DOI: https://doi.org/10.1057/jors.2010.68