Q1. According to the article, GDP every capita (or every head) in Europe has leveled off at Illustrate what fraction of GDP every capita in the United States?
Q2. Most restaurant customers tip according to a percentage rule - between 15-25 percent of the bill. Diners who have dinner also a $20 bottle of wine usually pay the same percentage of the bottle price as diners who order a $100 bottle. Why, whenever the same efforts must be made to uncork also pour both bottles?