ITLS Working Papers: Recent submissions
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A mixed generalized ordered response model for examining pedestrian and bicyclist injury severity level in traffic crashes
Published 2007-08-01This paper proposes an econometric structure for injury severity analysis at the level of individual accidents that recognizes the ordinal nature of the categories in which injury severity are recorded, while also allowing ...Open AccessWorking Paper -
Planning Approximations to the Length of TSP and VRP Problems
Published 2007-03-01This paper studies parsimonious, intuitive, and effective formulas to approximate the length of Traveling Salesman Problems (TSP) and Vehicle Routing Problems (VRP). Using intuition derived from continuous models and graph ...Open AccessWorking Paper -
Value chain positioning: Performance and partnerships
Published 2007-09-01The value chain is widely discussed by academics and practitioners. Among the numerous issues to be resolved one is of pressing importance; where in an industry value chain should the individual firm operate. The traditional ...Open AccessWorking Paper -
Should reference alternatives in pivot design SC surveys be treated differently?
Published 2008-04-01Analysts are increasingly making use of pivot style Stated Choice (SC) data in the estimation of choice models. These datasets often contain a reference alternative whose attributes remain invariant across replications for ...Open AccessWorking Paper -
Daytime Population Tracking for Planning and Pollution Exposure Assessment
Published 2007-03-01Knowing more precisely where people are across the day and when they are there is fundamental information for many fields including transportation planning, environmental impact analysis, marketing and emergency evacuation. ...Open AccessWorking Paper