During which decade were John Maynard Keynes' ideas challenged?

Suppose a bond has a coupon of $40, face value of $1000, and current price of $950. What is the coupon rate? What is its current yield? Report a percentage with two decimal places

What will be an ideal response?

One possible source of inefficiency in bargaining is

A) that there are multiple Nash equilibria. B) bounded irrationality. C) that the Nash product may be indeterminant. D) that the bargaining process takes time.