Using the Nationwide Personal Transportation Study surveys of 1977 and 1983-84, this article demonstrates that there is no discernible relationship between city size class and trip lengths, times, and speeds, and that commuting speeds did not decline between 1977 and 1983. The most convincing...

We describe a model that integrates a multi-regional input-output model of the U.S. (50 states and the District of Columbia) with the national highway network. Interstate commodity shipments are placed on a congestible highway network. Simulations of major choke-point disruptions redirect...

National security is a basic responsibility of national governments, but it is also intangible. What can economic analysis contribute? Benefit-cost analysis has rarely been applied because of the ambiguous and commons nature of the benefits. Our group at the University of Southern California's...

In this paper we summarize an integrated, operational model of losses due to earthquake impacts on transportation and industrial capacity, and how these losses affect the metropolitan economy. The procedure advances the information provided by transportation and activity system analysis...

Although there have been many elaborations of the basic input-output approach, including multi-regional models, dynamic models, models with variable coefficients, supply-side models, etc., these approaches all have the same limitation. The fixed-coefficients production function assumptions...

In previous research, the economic impacts of temporary shutdowns of the Los Angeles-Long Beach harbors were simulated after a hypothetical terrorist attack, applying the National Interstate Economic Model to estimate state-by-state as well as interindustry impacts. However, the "unpredictable"...

This note challenges the use of census data for evaluating changes in commuting speeds, partly because these data require indirect distance measures, but primarily because they do not differentiate between non-stop trips and trip chains. The proportion of trip chains to total trips increased...