Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ The Incentive Elasticity of Demand for Non-Motorized Transportation https://rip.trb.org/View/1359759 Thu, 02 Jul 2015 01:01:11 GMT https://rip.trb.org/View/1359759 Light Trucks and Highway Fatalities: The Role of Network Effects https://rip.trb.org/View/1236082 Thu, 03 Jan 2013 15:40:44 GMT https://rip.trb.org/View/1236082 Optimal Gasoline Taxes and the Elasticity of Demand for Gasoline https://rip.trb.org/View/1235189 Thu, 03 Jan 2013 15:25:52 GMT https://rip.trb.org/View/1235189