Problem: Border effects refer to asymmetries in trade patterns between cities and regions of different countries that share a national border and those that are located in the same country. Usually, trade volume is much lesser between the former cities and regions. Economic integration (as in the EU) may be a solution to overcome these effects.

Based on the paragraph above can we conclude that "There are asymmetrical aspects of patterns in trade when looking at regions and also cities in varying countries which have touching borders."?

A: Yes

Problem: The Opera Company of Boston was an American opera company located in Boston, Massachusetts, that was active from the late 1950s through the 1980s. The company was founded by American conductor Sarah Caldwell in 1958 under the name Boston Opera Group.

Based on the paragraph above can we conclude that "The Opera Company of Boston was the most popular opera company in America in the 1950s."?

A: It's impossible to say

Problem: The Central Radio & TV Tower () is a 405 m telecommunications- and observation tower in Beijing, China. It is the tallest structure in the city, the ninth-tallest tower in the world, and has its observation deck at 238 m . The tower provides panoramic views over the city from its revolving restaurant and observation deck. It is a member of the World Federation of Great Towers.

Based on the paragraph above can we conclude that "The Central Radio & TV Tower is 405 meters tall"?

A:
Yes