The question of how to model background variables in stochastic frontier analysis is seldom discussed in the literature. Some studies, following on from a long history of two-step TFP studies, include them in the determinants of efficiency. Others include them in the frontier itself. We propose a statistical method to obtain the appropriate specification of the influences on costs and inefficiency. We provide the example of a stochastic cost frontier for a panel of English and Welsh universities.
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Paper provided by National Institute of Economic and Social Research in its series NIESR Discussion Papers with number
239.
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