Data set used for example 4.7 and 4.9.3, p.114 and p.124, of An introduction to Efficiency and Productivity Analysis, 2nd edition.
data("multil_data")
A data frame with 5 observations on the following 3 variables.
year
years of observation
p1
a numeric vector containing prices metropolitan passenger kilometers
p2
a numeric vector containing prices long distance passenger kilometers
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.