This analysis of substance abuse expenditure trends from 1987 to 1997 finds that public payers share of substance abuse spending increased significantly; however, the authors note that substance abuse expenditure growth has been controlled relative to overall healthcare spending.  The authors also highlight the shift away from hospital-based substance abuse treatment over the study period. 

Dilonardo, J. D., Chalk, M. Mark, T. L., & Coffey, R. M. (2000). Recent trends in the financing of substance abuse treatment: implications for the future. Health Services Research, 35(5 Pt 3), 60-71. http://www.ncbi.nlm.nih.gov/pubmed/16148952

Authors: Joan D. Dilonardo, Mady Chalk, Tami L. Mark, Rosanna M. Coffey.