Comparing the effects of deferent periods data collection with the behavioral gravity Model in Baghdad city(Impendence function of work trips as case study)

M. Kasparian, Aram

	Comparing the effects of deferent periods data collection with the behavioral gravity Model in Baghdad city(Impendence function of work trips as case study)
JOURNAL OF THE COLLEGE OF EDUCATION FOR WOMEN
Article 1, Volume 22, Issue 3, 2011, Pages 539-553
Author
Aram M. Kasparian
Abstract
As we know the transportation studies regarded as one of a very important and difficult studies and one of its difficulties created from the process of data updating therefore the researcher well facing many difficulties to balancing between the old data on collecting new data.The research present an opinion which is summarized by: can we use the old data after we updated and used it as alternatives? Or the researcher must collect new data to complete their research which indicate to the present situation and some times they cant complete their studies because of the security, economic, temporally difficulties.The research used two kinds of data, the old data which belong to the period (1998) and new data which belong to the period (2008) and applied on the deterrence function of work trips.The main conclution of the research is that the old data are more significance than the new data and therefor we can use it as alternative in such studies.

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