New PDF release: An Illustrated Guide to USAF the Modern US Air Force

By Bill Gunston

ISBN-10: 0668054972

ISBN-13: 9780668054973

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Extra resources for An Illustrated Guide to USAF the Modern US Air Force

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But as valuable as they are for railways and regulators, it is a bit surprising that the statistical methods in use have had very little updating. Generally, simple linear regressions are still used. There is an econometric concern about this procedure. , implicitly assuming that each cost function is separable from all others. But this is unlikely in many instances. ’’ Waters and Woodland (1984) did an exploratory analysis showing the change in regression estimates when a set of Evolution of Railroad Economics 31 these activity–cost functions were estimated jointly.

But as valuable as they are for railways and regulators, it is a bit surprising that the statistical methods in use have had very little updating. Generally, simple linear regressions are still used. There is an econometric concern about this procedure. , implicitly assuming that each cost function is separable from all others. But this is unlikely in many instances. ’’ Waters and Woodland (1984) did an exploratory analysis showing the change in regression estimates when a set of Evolution of Railroad Economics 31 these activity–cost functions were estimated jointly.

S. CTAR (2001a, pp. 45–47) showed trends in the CN and CP operating ratio generally improving since 1992, and rates of return reaching 14–15 percent in the year 2000. But they note that one must look over a full business cycle to assess the financial condition of the industry. CTAR (2001a, p. 47) showed rail capital expenditures had not kept pace in mid-1980s–1995. 3. Productivity and Efficiency Performance Rail productivity gains and cost reductions were a major benefit of deregulation. There were significant efficiency gains under deregulation in the early years by eliminating the inefficiencies that were fostered under regulation.

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An Illustrated Guide to USAF the Modern US Air Force by Bill Gunston


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