2006年-世界发展银行全球_Trade_Reforms_and_Welfare___An_Ex-Post_Decomposition_of_Income_in_Vietnam_50页_411kb

Summary of "Trade Reforms and Welfare: An Ex-Post Decomposition of Income in Vietnam"

Core Content

This paper investigates the impact of trade reforms on household welfare in Vietnam during the 1990s, focusing on the role of direct and indirect channels in income growth for different groups of households. The analysis is based on panel data from the Vietnam Living Standards Survey (VNLSS) for 1993 and 1998, and it emphasizes the importance of considering both price and production changes, as well as other indirect effects, in understanding how trade liberalization affects welfare outcomes.

Main Points

• Trade Reforms and Poverty Reduction: Vietnam experienced a significant decline in poverty during the 1990s, largely attributed to trade reforms, especially the liberalization of rice trade. These reforms are seen as a crucial component in improving household welfare.

• Net Buyer vs. Net Seller Households:

  • Net buyers of rice are more prevalent in urban areas (around 95% in 1993, 91% in 1998).
  • In rural areas, only about 49% (1993) and 54% (1998) of households are net buyers.
  • Contrary to standard economic literature, net buyer households experienced greater growth than net seller households, highlighting the importance of indirect effects such as changes in wages and non-farm business income.

• Regional Differences:

  • Vietnam is divided into North and South regions, with the South including the Mekong Delta and the North including the Red River Delta.
  • The South had a more pronounced increase in rice prices compared to the North, due to the removal of internal trade restrictions and export quotas.
  • The decomposition of income growth shows that the multiplier effect (indirect effects) was especially important in urban areas, while both direct and indirect effects were significant for rural households.

• Income and Expenditure Structure:

  • Food constitutes a large portion of expenditure for both rural and urban households, with rice being the most significant component.
  • Poorer households spend a higher proportion of their income on food, especially rice, which is a staple in Vietnam.
  • The share of agricultural income in total income has remained relatively stable, but the composition has shifted, with more reliance on profit from rice and other crops and less on own consumption.

• Household Characteristics:

  • The majority of households in Vietnam (80%) are engaged in agriculture, with rice being the main crop.
  • Only about 21% of households in 1993 and 1998 did not own any land, with the majority of landless households concentrated in urban areas.
  • The proportion of households receiving technical agricultural advice increased between 1993 and 1998, indicating improved access to agricultural knowledge.

• Income Growth and Vulnerability:

  • The intensity of net buying (i.e., the proportion of rice expenditure relative to total expenditure) declined between 1993 and 1998, suggesting a reduction in vulnerability to rice price changes.
  • Rural households that switched from being net buyers to net sellers experienced greater growth compared to those that switched in the opposite direction.

Key Findings

• Pro-Poor Growth: Despite the increase in rice prices, the growth in income was more pronounced for poorer households across all categories, indicating a pro-poor impact of trade reforms.

• Dynamic Response: The traditional static approach of analyzing net buyers and sellers is insufficient. The dynamic response of households, including substitution and production adjustments, plays a crucial role in determining the welfare impact of trade reforms.

• Importance of Indirect Effects: The indirect effects of trade reforms, such as changes in wages and non-farm business income, were significant contributors to overall income growth, particularly for urban households.

• Rural-Urban Disparities: Urban households are more likely to be net buyers of rice, while rural households have a more mixed picture, with some being net sellers and others net buyers. This distinction is crucial in understanding the differential impact of rice price changes.

Conclusion

The study demonstrates that trade reforms in Vietnam had a broad-based and pro-poor effect on household welfare. The decomposition of income growth reveals that the indirect channels, such as wage increases and non-farm income, are as important as direct effects in driving welfare improvements. The findings emphasize the need for a more comprehensive model that captures the dynamic and indirect impacts of trade policy reforms on different household groups.