Analysis of Stated-Preference Experiments
Researchers Drs. Kenneth Train of the University of California, Berkeley and Wesley Wilson of the University of Oregon investigate stated-preference experimentation through an application to shippers' choice of route and mode along the Columbia/Snake River system. Constructing stated-preference experiments from a choice that the respondent made in a revealed-preference setting can enhance the realism of the stated-preference task and the efficacy of preference revelation. However, the practice creates endogeneity in the attributes of the stated-preference alternatives. The researchers describe a general estimation method that accounts for this bias and give specific examples based on the standard and mixed logit specifications of the revealed-preference choice.
Fact Sheet | Paper (pdf, 271 KB)
Regional Routing and Multi-Port Analysis
Researcher Dr. Frank Southworth of Oakridge National Laboratory is developing a model that will be used to analyze the effects on waterway flows and transportation costs due to changes in the levels of regional production and consumption, as well as changes in conditions on the transportation network. The paper describes the creation of a set of mode and commodity specific flows based on existing data, the assignment of these flows to a multimodal (truck, rail, water) representation of the United States transportation network, and an estimation of the costs of such movements over the respective modal sub-networks.
Fact Sheet | Paper (pdf, 1.3 MB)
Spatial Competition between Grain Elevators
Researcher Kevin E. Henrickson of the University of Oregon calls into question the models currently in use for measuring the benefits of inland waterway improvements and provides estimates that are easily adapted to those models in this recently released paper. The study investigates the effects of spatial competition, product supply and transportation demand on grain elevators. The results suggest that transportation demand varies across the spatial environment and the presence of competitors has a sizable impact on demands
Fact Sheet | Paper (pdf, 455 KB)
HarborSym Training in Jacksonville
On November 29-30, 2005, researchers Cory Rogers and Joseph Berlin of CDM Inc. and Keith Hofseth of IWR provided the HarborSym training to the USACE Jacksonville District. HarborSym is a vessel traffic simulation model that estimates the benefits of proposed harbor improvements. The model was developed to provide a consistent method for navigation planners and economists to estimate the benefits of harbor improvements. It is now functional. Currently, the model estimates the benefits of widening harbor channels and expanding turning basins and anchorages. Additional features are being implemented. The session was well received by the five Jacksonville District economists and navigation planners that took the training.
Regional Routing Model Peer Support Meeting
On December 12, the Regional Routing Model framework was presented to several academics, consultants, Corps planners and other Federal employees. The morning session discussed the development goals of the Regional Routing Model and the data sources used to create it. In the afternoon, the Regional Routing Model was formally presented, including a discussion on the data integration efforts and the discussion of an analytical tool to examine modal traffic changes within a corridor. The review materials are available on the NETS Website, and any additional comments will be welcomed. A second peer support review is slated for this April.
Fact Sheet | Review Materials
NETS web site: www.corpsnets.us
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Navigation Economic Technologies Program, US Army Corps of Engineers