GDP

Would you please answer the following questions:

• What do you think is the most significant factor or factors that have contributed to the United States being one of the richest countries in the world in terms of GDP?
• Over time, do you think the United States will be able to maintain its economic position? Why or why not?
• If you think the United States will be able to maintain its economic position, what types and/or fields of new innovations do you think will create the next wave of productivity growth?