Total Productivity Measurement in Bus Transit: Comment
Publication: Journal of Transportation Engineering
Volume 117, Issue 6
Abstract
This technical note comments on a 1990 paper by Sumanth and Adya that appeared in this journal. In that paper the authors determined total productivity and showed how innovations occurring in transit systems they analyzed have affected it. Using the definition of the authors, it is shown that there is a misspecification problem in the equations used by Sumanth and Adya in determining the effect of automation on total productivity. A relationship between total productivity and input productivity is formally derived, and it is suggested that this relationship is better than the one the authors presented.
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References
1.
Caves, D. W., Christensen, L., and Swanson, J. (1980). “Productivity in U.S. railroads, 1951–1974.” Bell J. of Economics, 11(1), 161–181.
2.
Caves, D. W., Christensen, L., and Threteway, M. (1981). “U.S. trunk air carriers, 1972–1977: A multilateral comparison of total factor productivity.” Productivity measurement in regulated industries, T. G. Cowing and R. E. Stevenson, eds., Academic Press, New York, N.Y., 47–76.
3.
Cowing, T. G., Small, J., and Stevenson, R. E. (1981). “Comparative measures of total factor productivity in the regulated sector: The electric utility industry.” Productivity measurement in regulated industries, T. G. Cowing and R. E. Stevenson, eds., Academic Press, New York, N.Y., 162–177.
4.
Sumanth, D. J., and Adya, B. (1990). “Impact of total productivity measurement on automation in bus transit.” J. Transp. Engrg., ASCE, 116(3), 377–395.
Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 117 • Issue 6 • November 1991
Pages: 713 - 717
Copyright
Copyright © 1991 ASCE.
History
Published online: Nov 1, 1991
Published in print: Nov 1991
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