We only implement programs that have been rigorously evaluated, that have proven and measurable impact, and that are cost-effective. We periodically review and assess the evidence base for our programs to ensure that we are aware of potential changes which may impact our assessment of the underlying strength of evidence for a program and to adapt our programs. The following is our current assessment of the evidence base for Dispensers for Safe Water.
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Despite the availability of inexpensive and easy-to-use technologies and simple behaviors that can prevent diarrhea, it kills more than half a million children a year, predominantly in the developing world. More troubling still, social scientists have found it challenging to get high adoption rates and maintain participation amongst poor households, even when the technology is provided free.
In a randomized controlled trial in Karachi, Pakistan, I test the hypothesis that perhaps families need tools that clearly demonstrate the impact of health interventions – in this case, chlorine tablets for water purification.