2015年-世界发展银行全球_Product_Relatedness_and_Firm_Exports_in_China_27页_223kb

Summary of "Product Relatedness and Firm Exports in China"

Core Content

This paper investigates the relationship between product relatedness and firm export performance in China using micro-level data from 2000 to 2006. It evaluates how the consistency of products with a local comparative advantage influences export growth and spillover effects at the firm level.

Main Viewpoints

• Product relatedness is defined as the density of links between a product and the local product space, combining intrinsic product relatedness and local specialization patterns.
• Export performance is measured by the log of export value of a firm in 2006, regressed on product-level density in 2000 and other firm and product characteristics.
• The study finds that export growth is faster for products with higher link density to the local productive structure, indicating that product relatedness enhances export performance.
• The positive effect of product relatedness is mainly limited to domestic firms and ordinary trade activities, not processing trade or foreign firms.
• High-productivity firms benefit more from product consistency with local comparative advantage, suggesting that absorptive capacity is a key factor in realizing spillover benefits.

Key Information

Data and Methodology

• The data comes from Chinese customs records, covering over 100,000 exporters and 5,016 products.

• Bilateral relatedness (φ) is calculated using co-exporting probabilities across 239 countries based on the Balassa index and Costinot et al.'s (2012) RCA index.

• Product density (Density) is defined as the average bilateral relatedness of a product with other products in the local export basket.

• The empirical model is:

  $$
  \ln X _ {k, 2 0 0 6} ^ {f} = \alpha \ln X _ {k, 2 0 0 0} ^ {f} + \beta \ln D e n s i t y _ {k, 2 0 0 0} ^ {l} + \gamma Z _ {k, 2 0 0 0} ^ {l} + \delta_ {f} + \eta_ {k} + \varepsilon_ {k} ^ {f}
  $$

• The final sample includes 11,458 firms in 294 cities, with 107,663 product observations.

Empirical Findings

• Product density positively correlates with export growth, especially for domestic firms and ordinary trade.
• High-productivity firms benefit more from product consistency with local capabilities, implying that spillovers depend on absorptive capacity.
• Foreign firms and processing trade are less affected by product relatedness, possibly due to limited integration with the local economy and reduced knowledge spillovers.
• The effect of product relatedness is robust to various checks, including endogeneity controls and alternative indicators.

Theoretical Contributions

• The study connects macro-level structural transformation literature with micro-level firm export dynamics.
• It highlights the role of product space in economic growth and export upgrading, showing that product consistency with local capabilities enhances spillover effects.
• The findings support the importance of local productive structures in shaping firm-level export strategies and technological diffusion.

Conclusion

The paper confirms that product relatedness with the local productive structure significantly enhances firm export performance in China, particularly for domestic firms and high-productivity firms. It suggests that spillovers from product consistency are not a substitute for productivity, and that foreign firms and processing trade are less effective in leveraging these spillovers. The results contribute to understanding the mechanisms of export upgrading and the importance of local comparative advantage in driving economic development.