=+e. Now consider me. I did not buy a house until the price of housing was $50 per square foot, at which time I bought a 4,000-square-foot house. Then the price of housing rises to $100 per square foot. Would I sell my house and buy a new one? If so, is the new house size hB9 larger or smaller than 4,000 square feet? Does your answer depend on whether housing is normal, regular inferior, or Giffen for me?