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175 results on '"Jara-Diaz, Sergio"'

66. Calculation of economies of spatial scope from transport cost functions with aggregate output with an application to the airline industry

Author

Jara-Diaz, Sergio R. and Basso, Leonardo J.

Subjects
Economies of scale -- Usage, Transportation -- Analysis, Transportation -- Economic aspects, Company growth, Business, Economics, Transportation industry
Abstract

Transport cost functions are used to study the advantages of expanding the network. The economies of spatial scope are estimated using transport cost functions, which are applied to airline industry.

Published
2005

69. On the specification of indirect utility and willingness to pay for discrete residential location models

Author

Jara-Diaz, Sergio R. and Martinez, Francisco J.

Subjects
Population geography -- Analysis, Individualism -- Demographic aspects, Consumer behavior -- Models, Geography, Social sciences
Abstract

In this paper we develop a framework to describe the individual choice of residential location using the microeconomics of discrete choices. The individual is seen as deciding frequency, duration, and location of a set of activities for each potential residential zone, knowing the distribution of goods and activities in space as well as transport costs and travel times. The conditional indirect utility function and its associated willingness to pay function for each zone are obtained, where the roles of accessibility, income, and neighborhood attributes emerge clearly. Zonal utility in discrete location choice models can be specified and interpreted using these functions.

Published
1999

73. On the proper modelling of multioutput port cargo handling costs

Author

Jara-Diaz, Sergio, Tovar, Beatriz, and Trujillo, Lourdes

Subjects
Cargo handling -- Economic aspects, Cost (Economics) -- Analysis, Business, Business, general, Economics
Abstract

A study was conducted to show that ignoring various heterogeneous outputs in cargo handling activities may lead to the underestimation of the relevance of key dimensions and a bias in the estimates of the relevance of other dimensions. A unique new dataset on three cargo handling firms operating in a Spanish port is also analyzed.

Published
2008

75. Estimation of marginal transport costs: the flow aggregation function approach

Author

Jara-Diaz, Sergio R., Donoso, Pedro P., and Araneda, Jorge A.

Subjects
Trucking -- Economic aspects, Direct costing -- Models, Motor vehicle fleets -- Management, Business, Economics, Transportation industry
Abstract

The zonal origin-destination (OD) marginal costs incurred by a national trucking system in Chile network are analyzed using a flow aggregation function approach. A Generalised Disjoint Aggregation Matrix was derived to estimate the costs which occur in moving an extra unit, with distance, topography, destination, volume level and system congestion as the relevant factors. The study generated zonal marginal costs with no linear relation to distance, and which were estimated at 14 US cents to 50 US cents per ton-kilometer. Volume became a significant factor to costs incurred within short hauls.

Published
1992

91. Value of time sensitivity to model specification

Author

Gaudry, Marc J.I., Jara-Diaz, Sergio R., and Ortuzar, Juan de Dios

Subjects
Choice (Psychology) -- Models, Transportation -- Models, Time perception -- Models, Utility theory -- Models, Business, Transportation industry
Published
1989

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