This paper examines the imposition of Anti-dumping (AD) duties on foreign imported products in Korea. We use panel data for Korean firms between 2002 and 2010 and estimate the changed firm-level productivity of domestic import-competing firms before and after the imposition of duties. In contrast to recent research analyzing the effects of AD measures on firm performance, we find evidence of a decrease in estimated productivity of protected domestic firms during the AD protection period. We then discuss the channels behind our results and find that the average productivity losses are not driven by the changes in company account variables that influence firm productivity during the protection period. Instead, we find that AD protection has heterogeneous treatment effects on firm productivity depending on the market structure.

Executive Summary 
  
I. Introduction 

II. The Data 

III. Empirical Methodology 
1. Total Factor Productivity (TFP) Estimation 
2. The Effects of AD Protection 

IV. Results 
1. Control Group 1 (10-digit HS code number): Importers Belonging to Affirmative AD cases 
2. Robustness Check 

V. Channels Behind the Results 
1. Changes in Firm-level Variables
2. Industry Competition 

VI. Conclusion 

References 

Appendix