Ahn, Seung; Lee, Young; Schmidt, Peter - In: Journal of Productivity Analysis 27 (2007) 1, pp. 1-12
This paper proposes a flexible time-varying stochastic frontier model. Similarly to Lee and Schmidt [1993, In: Fried H, Lovell CAK, Schmidt S (eds) The measurement of productive efficiency: techniques and applications. Oxford University Press, Oxford], we assume that individual firms’...