10. (4) Why would you expect sellers of branded goods with high upfront research and development costs to be more interested in free trade than producers who do not incur any xed costs? 11. (8) Focus attention on the Ricardian model, the Heckscher-Ohlin model, and the monopolistic competition model if trade. Consider the intraindustry trade index for each model. What value for the index does each models predict? Explain your