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An estimator for the road freight handling factor

 
Paper:ewp-urb/9703001
From:    
Date: Mon, 3 Mar 1997 17:08:17 +0100

Abstract:
Analysis of road fereight transport is hindered by the lack of diecdirect observartions of the handling factor. The handling factor is the frequency of lifts of the tonnes in the supply chain from origin to destination. It is also the number of times that the same tonnes are reported to the central statistical office. Changes in the tonnes lifted figure may be caused by changes in the actual tonnes in transport or by changes in the handling factor, in unknown propotions. An econometric technique using entropy can be used to estimate what has not been observed, and thus to recover the hidden variables, of both the handling factor and the tonnes in transport.

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EconWPA began as a conversation between Bob Parks and Larry Blume on January 28, 1993. I located Paul Ginsparg's archive (then xxx.lanl.gov) and he graciously installed his software on a Sun Sparc system which was supporting the department of economics email and computation. EconWPA began accepting papers July 1, 1993 and had ftp, email, gopher and web interfaces. The web interface for submissions was engineered into existence in July 1995. A complete and catastrophic machine failure in 1999 caused the loss of EconWPA's email new paper announcment service at which time there were over 15,000 subscriptions with over 8,000 unique email addresses.

In 2005, Arts and Sciences commandeered the computing services that I had provided to the Department of Economics since 1987. Some might say that the department was sold out, others would (erroneously) claim that centralization is efficient, and still others would claim that I have few marketing skills.

I was told that I could keep operating EconWPA (as well as many other services including rfe.wustl.edu, barnett.wustl.edu, and three RePEc servers) but I would receive no support (hardware, software, or anthing else) and (as had been the case) no compensation. At that point, given the apparent low valuation of my activities by the department, and university, it made no sense for me to continue operating EconWPA or other services.

Thanks to all who have supported EconWPA in the past.

A Chinese curse states May you live in intersting times. I have. Bob Parks - Jan 2006