1. An increase in the index of intra-industry trade implies that there has been an increase in the country's exports in that industry.

2. In models of trade with monopolistic competition, consumers gain access to an overall larger number of varieties, but may end up with a lower number of domestically produced (or local) varieties.

3. The gravity equation predicts that there should be more trade between the United States and Canada than between the United States and Argentina. Give two reason to support your assertion. (HINT: Argentina's economy is roughly 25% the size of Canada's)

4. Traditional models of monopolistic competition (the Krugman model) are not a good representation of reality because they imply that all firm should export and all firms are the same size.

5. Assume that San Francisco (SF) does not trade with the rest of the Bay Area and the market for sourdough bread in SF is monopolistically competitive, each baker makes a differentiated sourdough and sets their own price.