Thank you for this post. Our research group at UC Berkeley is interested in this question in the HIV context. We are conducting a randomized trial in Tanzania to compare the effects of conditional food and cash assistance for food insecure people living with HIV infection on adherence to antiretroviral therapy (NCT01957917). In addition to the food and cash transfer arms of the study, we have a comparison group who receives the standard-of-care adherence and nutrition counseling. We hope to contribute evidence to this important debate when our study is complete in 2015.