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The telecom data frame contains data on telecommunications providers in 21 countries in 1990.
telecom
data( telecom )
This data frame contains the following variables (columns):
The name of the country.
Output (index).
Mainlines (M km).
Number of employees (10,000 persons).
Coelli, T. J., Rao, D. S. P., and Battese, G. E. (1998) An Introduction to Efficiency and Productivity Analysis, Springer, New York.