The pilot study in Tanzania mentioned in this editorial, in which introducing subsidized ACT was associated with a rapid increase in the proportion of people accessing the drug from private shops, was published in PLoS ONE:

Sabot OJ, Mwita A, Cohen JM, Ipuge Y, Gordon M, et al. (2009) Piloting the Global Subsidy: The Impact of Subsidized Artemisinin-Based Combination Therapies Distributed through Private Drug Shops in Rural Tanzania. PLoS ONE 4(9): e6857. doi:10.1371/journal.pone.0006857

http://www.plosone.org/ar...