On a production possibilities diagram, points inside the frontier are: unattainable given existing technology and resources. inefficient. efficient. efficient but not necessarily desirable.Refer to Exhibit 10-2. Which indifference curve best reflects a person's indifference between a right shoe and a left shoe?Economics: is a natural science like biology and chemistry. is a science built on survey data and declared preferences (what people say they are going to do) not on revealed preferences (how people actually behave). is a science concerned with reaching generalizations about human behavior, not unlike sociology or psychology. is concerned with predicting business conditions in the future, not with the current state of the stock market