2012年-世界发展银行全球_Crises_Food_Prices_and_the_Income_Elasticity_of_Micronutrients___Estimates_from_Indonesia_28页_337kb

Summary of "Crises, Food Prices, and the Income Elasticity of Micronutrients: Estimates from Indonesia"

Core Content

This article investigates how food price crises affect the income elasticity of micronutrient consumption in Indonesia, using data from two cross-sectional household surveys conducted in 1996 and 1999. The focus is on understanding the effectiveness of cash transfer and nutrition supplement programs in mitigating the adverse effects of food price volatility on nutrition and poverty.

Main Points

• Context of Food Price Crises: The 2008 global food price crisis and previous spikes have drawn attention to the need for policies to protect vulnerable populations from food insecurity and malnutrition. Indonesia's 1997-98 economic crisis led to sharp currency depreciation and food price increases, providing a unique case to study the impact of price changes on household nutrition.

• Income Elasticity of Micronutrients: While the income elasticity of calories is well-documented, the income elasticity of micronutrients is less understood. The study finds that some key micronutrients (iron, calcium, vitamin B1) have significantly higher income elasticities during crises compared to normal years, whereas others (like vitamin C) show little to no responsiveness.

• Starchy Staple Ratio (SSR): SSR, defined as the share of calories from starchy staples (cereals and tubers) relative to total calories, is used as a proxy for dietary diversity and nutritional welfare. It is inversely related to the relative prices of higher-quality, more expensive foods. The analysis shows that SSR is more sensitive to price changes during crises, especially for poorer households.

• Methodology: The study uses both nonparametric and regression methods to estimate income elasticities, accounting for measurement errors and relative price changes. It also constructs a household-specific price deflator to adjust for inflation and changes in consumption patterns.

• Key Findings:

  • Income elasticities of micronutrients vary significantly across different food groups and income levels.
  • During crises, households may substitute away from more expensive, nutrient-rich foods, leading to reduced micronutrient intake.
  • The income elasticity of the starchy staple ratio differs between 1996 and 1999, indicating that price changes influence dietary composition.

• Policy Implications:

  • Cash transfer programs may be more effective during food price crises in improving micronutrient availability.
  • However, to ensure comprehensive nutrition, additional interventions such as nutrition supplements are necessary.
  • Policymakers should consider the sensitivity of nutrient income elasticities to relative price changes when designing food security and nutrition programs.

Key Information

• Data Source: The study uses data from the National Socio-Economic Survey (SUSENAS) in Indonesia, covering 60,678 households in 1996 and 62,217 in 1999.
• Price Changes: Between 1996 and 1999, Indonesia's food price index rose by 188 percent. Cereal prices increased significantly, while prices of other food groups like meat, fish, fruits, and vegetables rose even more.
• Income Elasticity Estimates:
  • Income elasticities of calories and micronutrients are nonlinear and vary with household income.
  • In 1999, the income elasticity of the starchy staple ratio was lower than in 1996, indicating a shift in dietary patterns.
• Methodological Innovation: The study introduces a household-specific price deflator to adjust for changes in relative prices, enhancing the accuracy of income elasticity estimates.

Conclusion

The research highlights the importance of understanding how food price changes affect the income elasticity of micronutrient consumption. It suggests that while cash transfers can be effective in mitigating the negative impacts of crises on nutrition, they may not fully address all nutrient deficiencies, emphasizing the need for complementary nutrition supplement programs. The findings also underscore the necessity of using robust methodologies that account for price volatility and measurement errors when assessing the effectiveness of food security policies.