| This paper analyzes antidumping (AD) policies in a two-
country model with heterogeneous firms. One country 
enforces AD so harshly that firms exporting to the country 
choose not to dump. In the short run, the country enforcing 
AD experiences reduced competition to the benefit of local 
firm and detriment of local consumers, but in the long run AD 
protection attracts new firms, increasing competition and 
consumer welfare. In the country’s trading partner, 
competition initially increases: Some firms give up exporting, 
but those that remain will lower their domestic prices. 
Consumers therefore benefit in the short run. In the long run, 
however, fewer firms will enter the unprotected country, and 
competition will eventually decrease, resulting in welfare 
losses. | 
        
            Abstract
  
                    
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