Data set used for example 4.10, p.128, of An introduction to Efficiency and Productivity Analysis, 2nd edition.
data("multil_data")
A data frame with 12 observations on the following 3 variables.
p1
prices of Mainland Freight services ($/NTK)
p2
prices of Tasrail Freight services ($/NTK)
p3
prices of Passenger services ($/PTK)
T. J. Coelli, D. S. Prasada Rao, C. J. O'Donnell, and G. E. Battese. An introduction to Efficiency and Productivity Analysis, 2nd edition. Springer Science + Business Media, New York, 2005.