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Beyond Tele-Substitution: Disaggregate Longitudinal Structural Equations Modeling of Communication Impacts

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  • Mokhtarian, Patricia
  • 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 in the context of the introduction of a community network to the city of Davis, California. Three major types of communication were measured: personal meetings (and in a separate but related measure, trips), transfer of an information object (in-house documents, regular mail, and express or overnight mail), and electronic (phone, fax, and e-mail). A system of structural equations was developed and estimated, expressing the number of instances of each type of communication at time 2 as a function of: the number of instances 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 the presence of some complementarity effects across modes. However, relationships specifically between electronic forms of communication and personal meetings or trips were not significant in either direction for the final models. Several exogenous variables were significant in logical ways.

Suggested Citation

  • Mokhtarian, Patricia & Meenakshisundaram, Ravikumar, 1999. "Beyond Tele-Substitution: Disaggregate Longitudinal Structural Equations Modeling of Communication Impacts," Institute of Transportation Studies, Working Paper Series qt4hg365gh, Institute of Transportation Studies, UC Davis.
  • Handle: RePEc:cdl:itsdav:qt4hg365gh
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    References listed on IDEAS

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    1. 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.
    2. 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.
    3. Gould, Jane & Golob, Thomas F., 1997. "Shopping Without Travel or Travel Without Shopping? An Investigation of Electronic Home Shopping," University of California Transportation Center, Working Papers qt6vc504h9, University of California Transportation Center.
    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.
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    Cited by:

    1. Golob, Thomas F., 2003. "Structural equation modeling for travel behavior research," Transportation Research Part B: Methodological, Elsevier, vol. 37(1), pages 1-25, January.
    2. Charlie Karlsson & Gunther Maier & Michaela Trippl & Iulia Siedschlag & Gavin Murphy, 2010. "ICT and Regional Economic Dynamics: A Literature Review," JRC Working Papers JRC59920, Joint Research Centre (Seville site).
    3. Bhat, Chandra R. & Sivakumar, Aruna & Axhausen, Kay W., 2003. "An analysis of the impact of information and communication technologies on non-maintenance shopping activities," Transportation Research Part B: Methodological, Elsevier, vol. 37(10), pages 857-881, December.
    4. Choo, Sangho, 2003. "Aggregate Relationships between Telecommunications and Travel: Structural Equation Modeling of Time Series Data," University of California Transportation Center, Working Papers qt4p78h623, University of California Transportation Center.
    5. Golob, Thomas F., 2002. "travelbehavior.com - Activity Approaches to Modeling the Effects of Information Technology on Personal Travel Behavior," University of California Transportation Center, Working Papers qt9t40s1mc, University of California Transportation Center.
    6. Golob, Thomas F. & Regan, Amelia C., 2001. "Impacts of Information Technology on Personal Tavel and Commercial Vehicle Operations: Research Challenges and Opportunities," University of California Transportation Center, Working Papers qt95r7j7vk, University of California Transportation Center.
    7. Ferrell, Christopher Erin, 2005. "The Effects of Teleshopping on Travel Behavior and Urban Form," University of California Transportation Center, Working Papers qt7911x32b, University of California Transportation Center.
    8. Donggen Wang & Fion Law, 2007. "Impacts of Information and Communication Technologies (ICT) on time use and travel behavior: a structural equations analysis," Transportation, Springer, vol. 34(4), pages 513-527, July.
    9. Patricia Mokhtarian, 2004. "A conceptual analysis of the transportation impacts of B2C e-commerce," Transportation, Springer, vol. 31(3), pages 257-284, August.
    10. Lee, Taihyeong & Mokhtarian, Patricia L., 2004. "An Input-Output Analysis of the Relationships Between Communications and Travel for Industry," University of California Transportation Center, Working Papers qt55x4h2r2, University of California Transportation Center.
    11. Taihyeong Lee & Patricia Mokhtarian, 2008. "Correlations between industrial demands (direct and total) for communications and transportation in the U.S. economy 1947–1997," Transportation, Springer, vol. 35(1), pages 1-22, January.
    12. Choo, Sangho & Mokhtarian, Patricia L., 2007. "Telecommunications and travel demand and supply: Aggregate structural equation models for the US," Transportation Research Part A: Policy and Practice, Elsevier, vol. 41(1), pages 4-18, January.
    13. Ben-Elia, Eran & Alexander, Bayarma & Hubers, Christa & Ettema, Dick, 2014. "Activity fragmentation, ICT and travel: An exploratory Path Analysis of spatiotemporal interrelationships," Transportation Research Part A: Policy and Practice, Elsevier, vol. 68(C), pages 56-74.
    14. Pawlak, Jacek & Polak, John W. & Sivakumar, Aruna, 2015. "Towards a microeconomic framework for modelling the joint choice of activity–travel behaviour and ICT use," Transportation Research Part A: Policy and Practice, Elsevier, vol. 76(C), pages 92-112.
    15. Golob, Thomas F. & Regan, A C, 2000. "Impacts of Information Technology on Personal Travel and Commercial Vehicle Operations: Research Challenges and Opportunities," University of California Transportation Center, Working Papers qt0zh556db, University of California Transportation Center.
    16. Makoto Tsukai & Makoto Okumura, 2003. "Changes in Japan?s inter-regional business linkage structure," ERSA conference papers ersa03p287, European Regional Science Association.
    17. Brown, Colby & Balepur, Prashant & Mokhtarian, Patricia L., 2005. "Communication Chains: A Methodology for Assessing the Effects of the Internet on Communication and Travel," University of California Transportation Center, Working Papers qt4cf351bc, University of California Transportation Center.
    18. Hejun Kang & Darren Scott, 2011. "Impact of different criteria for identifying intra-household interactions: a case study of household time allocation," Transportation, Springer, vol. 38(1), pages 81-99, January.
    19. Golob, Thomas F., 2011. "Structural Equation Modeling For Travel Behavior Research," University of California Transportation Center, Working Papers qt2pn5j58n, University of California Transportation Center.
    20. Golob, Thomas F., 2001. "Structural Equation Modeling For Travel Behavior Research," University of California Transportation Center, Working Papers qt8pb2m1pk, University of California Transportation Center.

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    Keywords

    communication; modeling; activities; travel;

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