2013年-世界发展银行全球_Burkina_Faso___Determinants_of_Cereal_Production_Stochastic_Frontier_Approach_for_Panel_Data_22页_470kb

Summary of the Policy Note on Determinants of Cereal Production in Burkina Faso

Core Content

This policy note examines the determinants of cereal production in Burkina Faso using a stochastic frontier approach for panel data, analyzing the factors that influence productivity in the agricultural sector. The study focuses on the main cereals—millet, maize, rice, fonio, and sorghum—and highlights the role of land, labor, and environmental conditions in shaping production outcomes.

Main Cereals and Their Role

• Millet is the most important cereal, followed by maize and sorghum.
• Millet and maize alone account for 80% of land allocated to cereal production.
• Rice is mostly imported and consumed in urban areas, while fonio and sorghum are more widely produced and consumed.
• Cereals contribute 73% to the total dietary energy supply, with sorghum and millet making up 26% and 22%, respectively.

Production Trends and Yield Analysis

• The average cereal yield over 2002–2007 was 660.4 kg/ha, with significant fluctuations.
• Males headed households were generally more productive than females, with an average yield of 615.8 kg/ha versus 541.4 kg/ha.
• Female farmers achieved higher yields than male farmers in 2005, possibly due to better management practices or more favorable conditions.
• Age also plays a role, with farmers over 50 years old showing higher yields than those aged 15–50, though the yield gap was only significant in 2005.

Land and Labor Characteristics

• 97% of cereal farmers operate in plains/Plato, and 98% do not use anti-erosion techniques, which can lead to soil degradation.
• Land is the dominant driver of cereal production, with an elasticity of 1.61 (without fixed effects), but this decreases when considering fixed effects.
• Family labor dominates cereal farming, accounting for 77% of the total labor force, with males contributing more during plowing and crop management seasons.
• Hired and loaned labor have a positive impact on cereal yields, while family labor has a negative effect.

Methodology

• The study uses the stochastic frontier approach developed by Battese and Coelli (1995) and Kumbhakar and Lovell (2000).
• The production function is estimated using logarithmic transformation, with technical efficiency and total factor productivity (TFP) as key components.
• The analysis accounts for provinces and time fixed effects, which significantly influence the results.

Estimation Results

• The Likelihood-ratio test confirms significant provinces and time heterogeneity.
• Land remains the most important input, with a significant impact on production.
• Fertilizer use is nonlinear, with a minimum level required to observe increases in yield.
• Rainfall has a substantial effect on production, with a 10% increase leading to a 17.4% increase in cereal output.
• Technical efficiency varies across regions, with the Centre, Sahel, and Sud Ouest being the most dependent on cereal revenue.

Key Findings

• Land is the primary determinant of cereal production, with a significant elasticity.
• Cereal production is highly dependent on rainfall, highlighting the vulnerability of the sector to climate variability.
• Provinces and time fixed effects are crucial in explaining production differences, indicating regional and temporal variations in productivity.
• Female-headed households are less productive due to poor land quality and lack of physical strength to implement soil conservation techniques.
• Intercropping improves yield compared to mono-cropping, suggesting that diversification could enhance productivity without increasing input levels.

Policy Implications

• The National Strategy for Food Security by 2015 aims to increase domestic food production and improve access to food through market strengthening.
• Enhancing technical efficiency and TFP could help achieve sustainable food security and poverty reduction.
• Irrigation and soil conservation are critical for improving cereal yields, especially in regions with poor land quality.
• Gender-based policies should address the structural disadvantages faced by female farmers in accessing productive land and labor resources.

Conclusion

The study underscores the importance of land, rainfall, and labor in determining cereal production in Burkina Faso. It highlights the need for targeted interventions to improve technical efficiency, soil conservation, and gender equity in the agricultural sector. The results also emphasize the role of regional and temporal factors in shaping production outcomes, suggesting that policies should be tailored to these variations to ensure sustainable growth and food security.