Dynamic Structural Equation Models of Activity Participation and Travel Behavior using Puget Sound Transportation Panel

Puget Sound Transportation Panel을 이용한 활동참여와 통행행동의 Dynamic SEM

  • Published : 2002.12.01

Abstract

This paper develops a dynamic structural equation model, which captures relationships among socio-demographics, activity participation(i.e., time use) and travel behavior in consideration with time variation effects. The data used in developing the model are two waves(the year 1991 and 1992) from Puget Sound Transportation Panel (PSTP). which is surveyed in Puget Sound Region in United States. The PSTP is widely used in transportation behavior analysis and includes various information of traveler's socio-economic, travel patterns, and activity participation. In the model, we use 10 endogenous variables including activity participations and travel behaviors and 10 exogenous variables composed of time variant and invariant traveler's socio-demographic variables. The empirical model shows that strong relationships exist not only between socio-demographics and travel behavior, but between waves. We also confirm needs of panel data set to identify and understand time variation effects and travel behaviors.

본 연구에서는 개인의 사회, 경제적 특성과 활동참여, 통행행동의 관계를 규명하기 위하여 개인의 사회 경제적 특성을 시간 변동 외생변수와, 시간 불변동 외생변수로 설정하고 개인의 활동참여와 통행행동에 관한 변수를 내생변수로 설정하여 모형을 구축하였다. 모형의 실효성을 검증하기 위하여 분석에 사용된 자료는 1991년, 1992년 미국 Puget Sound 지역의 Transportation Survey 자료를 이용하였으며, Panel 자료의 변수 간 복잡한 상호관계를 규명해 내기 위하여 Dynamic Structural Equation Model을 구축하였다. 활동참여와 통행행 동에 관한 10개의 내생변수와 개인의 사회, 경제적 특성인 10개의 외생변수를 사용하여 모형추정을 한 결과, 개인의 생계활동에 의해 유지활동과 여가활동은 시간적 제약을 받고, 여가활동은 유지활동에 제약을 받게 된다는 것을 알게 되었으며, 개인의 사회경제지표에 의해 영향을 받는 것으로 나타났다. 또한, 개인의 활동 패턴은 과거 연도의 각 활동 지속시간과 통행패턴에 영향을 받는 것으로 나타나 Panel 자료 분석의 필요성이 부각되었다. 본 연구의 결과로부터 보다 충실한 활동기반모형의 구축을 위해서는 Panel 자료의 구축의 필요성이 더욱 요구된다.

Keywords

References

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