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Beyond Tele-substitution: A Broader Empirical Look at Communication Impacts

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  • Mokhtarian, Patricia L.
  • Meenakshisundaram, Ravikumar

Abstract

Information on the number and types of communication activities (including travel) engaged in over a period of four consecutive days, at two points in time about six months apart, was collected from 91 respondents. A system of structural equations was developed and estimated, expressing the quantity of each type of communication at time 2 as a function of quantities of communication of each type at time 1, the elapsed time between measurements, and exogenous sociodemographic variables. All "own" lagged effects (that is, the effect of one communication type in wave 1 on the same type of communication in wave 2) were found to be positive and (except for information object delivery) highly significant. The "elapsed time" variable was always positive and (except for personal meetings and, in one model, information object delivery) significant; these effects indicate net generation of communication activities over time. Significant "cross" lagged effects (that is, the effect of one communication type in wave 1 on a different type in wave 2) were mostly positive, indicating that the predominant effect across modes is complementarity rather than substitution. Several exogenous variables were also significant in logical ways.

Suggested Citation

  • Mokhtarian, Patricia L. & Meenakshisundaram, Ravikumar, 1998. "Beyond Tele-substitution: A Broader Empirical Look at Communication Impacts," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt4n2404f0, Institute of Transportation Studies, UC Berkeley.
    • Handle: RePEc:cdl:itsrrp:qt4n2404f0
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    References listed on IDEAS

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    1. Mokhtarian, Patricia L., 1990. "A Typology of Relationships Between Telecommunications And Transportation," University of California Transportation Center, Working Papers qt4rx589m0, University of California Transportation Center.
    2. Claisse, Gérard & Rowe, Frantz, 1993. "Domestic telephone habits and daily mobility," Transportation Research Part A: Policy and Practice, Elsevier, vol. 27(4), pages 277-290, July.
    3. Mokhtarian, Patricia & Handy, Susan & Salomon, Ilan, 1995. "Methodological Issues in the Estimation of the Travel, Energy, and Air Quality Impacts of Telecommuting," Institute of Transportation Studies, Working Paper Series qt44n3k2jp, Institute of Transportation Studies, UC Davis.
    4. Balepur, Prashant Narayan, 1998. "Impacts of Computer-Mediated Communication on Travel and Communication Patterns: The Davis Community Network Study," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt6cb1f85c, Institute of Transportation Studies, UC Berkeley.
    5. Mokhtarian, Patricia L. & Handy, Susan L. & Salomon, Ilan, 1995. "Methodological issues in the estimation of the travel, energy, and air quality impacts of telecommuting," Transportation Research Part A: Policy and Practice, Elsevier, vol. 29(4), pages 283-302, July.
    6. Patricia L. Mokhtarian, 1998. "A Synthetic Approach to Estimating the Impacts of Telecommuting on Travel," Urban Studies, Urban Studies Journal Limited, vol. 35(2), pages 215-241, February.
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