2010年-世界发展银行全球_A_Multicomponent_Irrigation_Program_in_Peru___Evaluating_the_Impact_on_Farm_Households_93页_2mb

Summary of Evaluating the Impact on Farm Households: A Multicomponent Irrigation Program in Peru

Core Content

This report presents an impact evaluation of the World Bank-supported Programa Subsectorial de Irrigaciones (PSI) in rural coastal Peru. The program consists of three main components: two off-farm and one on-farm. The off-farm components focus on the rehabilitation of public irrigation infrastructure and institutional training for water user associations (WUAs), while the on-farm components include subsidies for modern irrigation equipment (PIRT) and on-farm extension and training services (PERAT).

The evaluation aims to assess the program's impact on agricultural productivity, economic well-being, and whether the multicomponent design yielded better outcomes than individual components. It also investigates if on-farm investments had spillover effects on neighboring households.

Main Findings

1. Impact on Agricultural Performance and Economic Well-Being

• Infrastructure Rehabilitation and WUA Training: These two off-farm components led to a 27% increase in farm labor demand and a 47% increase in wage income, equivalent to a 10% increase in total farmer income.
• Crop Production: Treated households showed increased production of main staples (potatoes and beans) and industrial crops (cotton, coffee, cocoa). For instance, bean production more than doubled, and root crop production increased by almost 50%.
• Income Changes: The average time between project completion and data collection was less than three years, which was enough to observe the effects of short-cycle crops but not long-term ones like coffee or oranges.
• Poor Farmers: Poor households saw increases in output, income, and agricultural profit per capita compared to similar non-beneficiary households. They also reported higher nonwage income and less manual labor on other farms.
• Nonpoor Farmers: While they also benefited, their total crop production decreased in the short term due to the time required for permanent crops to mature.

2. Effectiveness of the Multicomponent Design

• Complementarities: The on-farm irrigation technology (PIRT) and infrastructure rehabilitation (Component A) had positive complementarities, with treated households seeing a 7% increase in total production value.
• Synergies: The combination of components was perceived by some respondents as more effective in achieving program goals than any single component.
• Productivity Gains: The integrated approach improved productivity, particularly when both components were implemented in the same locality.
• Limitations: The off-farm components did not show productivity improvements, only changes in production levels.

3. Spillover Effects

• Positive Spillovers: The on-farm irrigation technology and extension services had spillover effects, increasing market sales and labor demand in the surrounding areas.
• Community-Level Benefits: The extension and demonstration activities encouraged better technology use and new farming practices, which had community-level impacts.
• Labor Hiring: Beneficiaries were more likely to hire laborers, which contributed to new employment opportunities in the local market.
• Data Limitations: The spillover effects were not directly measurable for on-farm components, as the analysis focused on average effects across localities.

Key Information

• Methodology: A mixed-methods approach was used, combining qualitative insights and quantitative data.
• Data Sources: The evaluation used ENAHO (National Household Survey), ENAPROVE (National Agricultural Survey), and GIS (Geographic Information System) data.
• Geographic Analysis: Control and treatment groups were defined using geographic data and project catchment areas.
• Challenges: The program was not designed for impact evaluation, leading to limited data collection and non-random allocation of benefits.
• Innovation: The use of location coordinates, land-use data, and water source information helped define catchment areas for each project.

Conclusion

The multicomponent irrigation program in Peru had positive impacts on agricultural performance and economic well-being, particularly for poor farmers. The combination of infrastructure rehabilitation and on-farm technology was found to be more effective than individual components. However, productivity improvements were not always observed, and some negative externalities were noted when both components were implemented in the same locality. The evaluation also highlights the importance of institutional capacity and extension services in promoting sustainable agricultural practices and improving the distributional outcomes of the program.

The findings suggest that multicomponent interventions can be more effective in achieving agricultural and economic improvements, but careful design and implementation are essential to maximize benefits and minimize unintended consequences.