亚开行-培养营养_来自菲律宾结构化电子食品券随机试验的证据（英）-2025.12_36页_653kb

Summary of "Nurturing Nutrition: Evidence from a Randomized Trial of Structured Electronic Food Vouchers in the Philippines"

Core Content

This working paper presents the findings of a randomized controlled trial (RCT) evaluating the impact of structured electronic food vouchers on food security, nutrition, and health outcomes in poor households in the Philippines. The study, part of a pilot to inform the national Walang Gutom (Zero Hunger) Food Stamp Program (WGP), aimed to assess the effectiveness of a program that combines food vouchers with nutrition education sessions. The pilot was implemented across five provinces and involved 4,883 households, with results showing statistically significant improvements in food expenditure, dietary diversity, and food security after six months.

Main Findings

• Effectiveness of Vouchers: Structured electronic food vouchers led to improvements in food expenditure, dietary diversity, and food security.
• Dietary Impact: The effects were more pronounced for proteins and fruits and vegetables, which are under-consumed, compared to carbohydrates, which are already consumed in high quantities.
• Urban vs Rural: Dietary effects were more significant in highly urban areas, particularly in Tondo, Manila, which had better access to refrigeration and fewer self-sufficient food production practices.
• Complementary Programs: Households enrolled in the Pantawid Pamilyang Pilipino Program (4Ps), those with better nutrition knowledge, and smaller households showed stronger responses to the vouchers.
• Redemption Frequency: Households that redemed vouchers more recently had better outcomes, indicating that frequency of use affects effectiveness.
• Voucher Design: Adjusting voucher allocation ratios toward under-consumed food groups, increasing voucher amounts, and improving nutrition education could enhance program effectiveness.

Key Information

• Voucher Design: Vouchers were structured with fixed shares for different food groups—carbohydrates (50%), proteins (30%), and fruits and vegetables (20%).
• SBCC Integration: Monthly social and behavior change communication (SBCC) sessions were required for voucher redemption and aimed to improve nutrition knowledge and healthy eating habits.
• Program Context: The WGP is intended to be scaled to 750,000 poorest households by 2027, and this pilot study was conducted to inform its design and implementation.
• Implementation: Vouchers were distributed via Electronic Benefit Transfer (EBT) cards and could be redeemed only at designated retailers.
• Limitations: Households located more than 20 km from vendors were excluded from the randomization, potentially affecting the representativeness of the results for rural areas.

Methodology

• Study Design: A matched pair cluster-randomized controlled trial (RCT) was used to compare outcomes between control and treatment groups.
• Sample Size: 4,883 households were included in the study, with baseline and endline data collected.
• Geographic Coverage: The study was conducted in five provinces—Isabela, Camarines Sur, Manila, Surigao del Norte, and Maguindanao del Norte—with one municipality per province.
• Targeting: Households were selected based on Listahanan 3, a national poverty targeting system. The pilot targeted households in the bottom 1 million of this database.
• Data Collection: Detailed food consumption and acquisition data were collected to assess how households responded to different voucher allocations.

Policy Implications

• The study highlights the importance of voucher design in influencing dietary behavior.
• Nutrition education plays a crucial role in enhancing the effectiveness of vouchers.
• Contextual factors such as urbanization, access to refrigeration, and existing social protection programs significantly affect program outcomes.
• Program scaling should consider targeting, voucher amount, redemption frequency, and market accessibility to ensure effectiveness across diverse settings.

Conclusion

The pilot study demonstrates that structured electronic food vouchers, when combined with nutrition education, can improve food security and dietary diversity in poor households. However, the effectiveness is context-dependent, and program design and implementation are key to maximizing impact. The findings support the scale-up of the WGP, with recommendations to adjust voucher allocations, increase voucher amounts, and improve SBCC strategies for optimal results.