Gao S, Mokhtarian PL, Johnston RA.  2007.  Non-normality of data in structural equation modeling. Transportation Research Record.
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Gao S, Mokhtarian PL, Johnston RA.  2007.  Exploring the causal connections among job accessibility, employment, income, and auto ownership with structural equation modeling. The Annals of Regional Science.
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Gao S, Johnston RA, McCoy MC.  2007.  Neighborhood economic and racial succession: Understanding this process of decline and its effects on residential choice in land use models. 10th International Conference on Computers in Urban Planning and Urban Management.
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Gao S, Johnston RA, McCoy MC.  2007.  Neighborhood economic and racial succession: Understanding this process of decline and its effects on residential choice in land use model. 10th International Conference on Computers in Urban Planning and Urban Management.
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Johnston RA, Gao S, McCoy MC, Hunt JD, Abraham J.  2007.  Integrated urban model for California: Policy evaluation capabilities. 11th World Conference on Transport Research.
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Johnston RA, Gao S, McCoy MC, Abraham J.  2007.  Interpreting Performance Indicators from A Statewide Integrated Transportation-Land Use Model. CUPUM.
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Walker T, Gao S, Johnston RA.  2007.  UPlan: A discrete choice, supply-side, land use planning model. Transportation Research Record.
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Thorne JH, Gao SY, Hollander AD, Kennedy JA, McCoy M, Johnston RA, Quinn JF.  2006.  Modeling potential species richness and urban buildout to identify mitigation sites along a California highway. TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT. 11:277--291. Abstract
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Gao S, Johnston RA.  2005.  The spatial mismatch hypothesis: Critique of research and proposed methods. Transportation Research Board 84th Annual Meeting.
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Johnston R, Gao S, Clay M.  2005.  Modeling Long-Range Transportation and Land Use Scenarios for the Sacramento Region, Using Citizen-Generated Policies. Transportation Research Record . 1902
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Merenlender AM, Brooks C, Shabazian D, Gao S, Johnston RA.  2005.  Forecasting exurban development to evaluate the influence of land-use policies on wildland and farmland conservation. Journal of Conservation Planning. 1
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Johnston RA, McCoy M, Kirn M, Fell M.  2004.  Streamlining the National Environmental Policy act process through cooperative local-state-federal transportation and land use planning. ENERGY AND ENVIRONMENTAL CONCERNS 2004. :135--143. Abstract
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Johnston RA, Shabazian DR, Gao SY.  2003.  UPlan - A versatile urban growth model for transportation planning. TRAVEL DEMAND AND LAND USE 2003. :202--209. Abstract
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Johnston RA, Shabazian D, Gao S.  2003.  UPlan: A versatile urban growth model for transportation planning. Transportation Research Record. 183
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