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PAPER:   
Lavieri, P.S., Q. Dai, and C.R. Bhat (2018), 
	"Using Virtual Accessibility and Physical Accessibility as Joint Predictors 
	of Activity-Travel Behavior," Transportation Research 
Part A, Vol. 118, pp. 527-544
	(Keywords: ICT use, virtual/physical activity participation, GHMD model, 
	time poverty, social exclusion, social roles).  
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