Trade policy affects market power differently through tariffs and non-tariff measures. By analyzing export data from 12 countries, researchers found that tariffs reduce foreign firms' market power, while non-tariff measures strengthen the market power of both domestic and foreign firms. Pricing-to-market behavior is common across all regions and firm sizes, showing how firms adjust prices in different markets based on exchange rates. This study highlights the complex relationship between trade policy, market structure, and firm behavior.