Evidence on designing sanitation interventions.

Area of Science:

• Public Health
• Environmental Science
• Behavioral Economics

Background:

• Sanitation is a public good with shared responsibility between households and government.
• Interventions in sanitation provision must address the potential for 'crowd out', where public support reduces private investment.

Purpose of the Study:

• To analyze new findings on sanitation provision from 12 papers.
• To provide a micro-foundations model for understanding household sanitation investment decisions under joint responsibility.
• To explore the implications of different intervention designs (information, transfers, subsidies) on crowd out.

Main Methods:

• Development of a simple model of household choice regarding sanitation investment.
• Analysis of 12 papers within the context of this model.
• Discussion of findings through the lens of the established framework.

Main Results:

• The model clarifies conditions under which crowd out is a significant concern.
• Different intervention types (information, in-kind, cash, subsidies) have distinct implications for household investment.
• The study synthesizes findings from multiple papers on sanitation provision strategies.

Conclusions:

• Understanding household decision-making is crucial for effective sanitation interventions.
• Intervention design significantly impacts the balance between public and private sanitation investment.
• Future sanitation policies should carefully consider crowd-out effects and tailor approaches to household behavior.