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Clark, R.E., Teague, G.B., Ricketts, S.K., Bush, P.W., Xie, H., McGuire, T.G., Drake, R.E., McHugo, G.J., Keller, A.M. and Zubkoff, M. Cost-effectiveness of assertive community treatment versus standard case management for persons with co-occurring severe mental illness and substance use disorders. Health Services Research, 33(5), 1285-1307, 1998

Clark, R.E., Bush, P.W., Becker, D.R., & Drake, R.E. A cost-effectiveness comparison of supported employment and rehabilitative day treatment. Administration and Policy in Mental Health, 24(1), 63-77, 1996

Clark, R., Teague, G., Ricketts, S., Bush, P.W., Zubkoff, M., & Keller Measuring resource use in economic evaluations: Determining the social costs of mental illness. Journal of Mental Health Administration, 21(1), 32-41, 1994

Bartels, S.J., Teague, G.B., Drake, R.E., Clark, R.E., Bush, P.W., Noordsy, D.L Substance abuse in schizophrenia: Service utilization and costs. Journal of Nervous and Mental Disease, 181:227-232, 1993