Vol I, Issue 5  May 2005

Study Compares Fully Spatial Equilibrium Model To Traditional Corps Planning Model
In this paper, NETS researchers Simon Anderson of the University of Virginia and Wesley Wilson of the University of Oregon develop a “fully” spatial equilibrium theoretical model.

The model allows geographically dispersed shippers to choose where and how to ship and how much to produce both in the short- and long-run. Because rail and barge/truck rates determine equilibrium market areas, the model allows for railroad prices to adjust.

The model is contrasted with the traditional Corps of Engineers planning model which assumed that demand is perfectly inelastic up to a threshold point above which demand is assumed to shift completely to rail. The study also assesses possible sources of over-estimation and under-estimation of benefits within the Corps model when compared to the fully spatial model.

Fact Sheet | Paper (pdf, 394KB)

Profile of Barge Industry Developed
A study profiling the barge industry as a critical element of the waterways industry has been released by NETS researchers Gene Griffin, Kim Vachal and Jill Hough of the Great Plains Transportation Institute.

The study evaluates the current structure, conduct and performance of the industry in an effort to provide a stronger knowledge base and enhance Corps planning efforts. The study is intended as a first step in addressing a scarcity of published information on the carrier industry, according to the researchers.

Fact Sheet | Paper (pdf, 10.2MB)

NETS Research Presented at International Industrial Organization Conference
On April 8 NETS Program Manager Keith Hofseth chaired the session “Network Demands, Supply and Equilibrium over Space.” Four NETS research papers were presented. (The following links are to the most recent versions of the presented paper, some of which may have revised titles.) Dr. Wes Wilson presented “Transportation Demand for Grain Shipments, A Revealed and Stated Question Approach” and “Efficiency, Performance and Supply of Lock Services.” Dr. Simon Anderson presented “Spatial Modeling in Transportation: Congestion and Mode Choice.” Dr. Ken Boyer presented “The Demand for Freight Transportation on the Mississippi River and Illinois Waterway.”

NETS web site:

Download the reader for PDF documents.

Navigation Economic Technologies Program, US Army Corps of Engineers