00201718

Component

http://onlinepubs.trb.org...s/hrr/1969/285/285-009.pdf

A MODIFIED FORM IS PRESENTED OF A LEONTIEF-TYPE INPUT-OUTPUT MODEL WHOSE TECHNOLOGICAL COEFFICIENTS ARE SENSITIVE TO CHANGES IN TRANSPORTATION COSTS AND FACTORY PRICES OF COMMODITIES. THE MODEL IS PROPOSED AS A DEVICE FOR FORECASTING INTERREGIONAL COMMODITY FLOWS AS A FIRST STEP IN FORECASTING TRANSPORTATION DEMANDS THROUGHOUT A REGION. A THEORETICAL FRAMEWORK IS DEVELOPED TO DERIVE A SET OF RELATIONSHIPS THAT MAY BE ESTIMATED STATISTICALLY AND USED TO COMPUTE REVISED TECHNOLOGICAL COEFFICIENTS WHENEVER THERE ARE CHANGES IN DELIVERED PRICES OF COMMODITIES. THE IMPLEMENTATION OF THE LEONTIEF-TYPE MODEL REQUIRES THAT ECONOMIC DATA FOR A BASE YEAR BE COLLECTED AND ARRANGED IN AN INPUT-OUTPUT TABLE TO REVEAL THE INTERREGIONAL FLOW OF COMMODITIES AMONG THE VARIOUS INDUSTRIES SITUATED IN THE STUDY AREA. THE INTERRELATIONSHIPS REVEALED BY THE BASE YEAR INPUT-OUTPUT TABLE CAN BE USED TO PREDICT THE SHIFT THAT MIGHT BE EXPECTED TO OCCUR AS A RESULT OF A GIVEN CHANGE IN DEMAND. THE FLOWS OF COMMODITIES DESCRIBED BY THE INPUT-OUTPUT TABLE MUST BE ACCOMPLISHED BY THE TRANSPORTATION SYSTEM. INPUT-OUTPUT ANALYSIS CAN THEREFORE BE USED AS A TOOL IN THE PREDICTION OF CHANGES IN THE DEMAND FOR TRANSPORTATION WHEN THESE ARE A CONSEQUENCE OF CHANGES IN FINAL DEMAND. BECAUSE CHANGES IN TRANSPORTATION COSTS MAY BE AN IMPORTANT SOURCE OF VARIATIONS IN DELIVERED PRICES, THE MODEL IS DESIGNED TO BE SENSITIVE TO SUCH CHANGES. THE TECHNIQUE BY WHICH THE RELATIONSHIPS BETWEEN DELIVERED COSTS AND COMMODITY FLOWS ARE ACCOMPLISHED IS AN ANALYTICAL METHODOLOGY THAT ASSUMES INDUSTRIES BEHAVE LIKE FIRMS THAT MINIMIZE COSTS AND HAVE LINEAR HOMOGENEOUS PRODUCTION FUNCTIONS BELONGING TO A SPECIFIC FAMILY OF SUCH FUNCTIONS.

Paper sponsored by Committee on Socio-Economic Aspects of Highways. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01410225

p 104

1969

Highway Research Record

Digital/other

Commodities; Commodity flow; Costs; Demand; Forecasting; Input output devices; Mathematical models; Statistical analysis; Theory; Transportation

Transportation models

Data and Information Technology; Economics; Society; Transportation (General)

TRIS, TRB

Nov 24 1994 12:00AM

• A RESOURCE ALLOCATION MODEL FOR TRANSPORTATION PLANNING
• DEVELOPMENT OF A TRANSIT COST ALLOCATION FORMULA
• ECONOMIC ASPECTS OF URBAN PASSENGER TRANSPORTATION
• ENGINEERING-ECONOMIC SYSTEMS ANALYSIS FOR TRANSPORT PLANNING IN DAHOMEY, WEST AFRICA
• Information Needs of Interstate Highway Motorists in Iowa
• PROJECTING AUTOMOBILE AVAILABILITY BY URBANIZED AREA
• THE ECONOMIC BENEFITS ACCRUING FROM THE SCENIC ENHANCEMENT OF HIGHWAYS
• THE ECONOMICS OF THE DIESEL FUEL TAX DIFFERENTIAL
• THE INFLUENCE OF THE HIGHWAY NETWORK STRUCTURE ON THE ECONOMIC DEVELOPMENT OF WEST VIRGINIA
• THE USE OF LAND DEVELOPMENT SIMULATION MODELS IN TRANSPORTATION PLANNING