6. The immediate effect of gasoline Prices increases in the aftermath of the Persian Gulf crisis in August 1990 on gasoline consumption was not very significant.
 Would you expect the consumption of gasoline to be more severely affected if these higher prices remained in effect for a year or more?
 Why or why not? 
8. Would you expect the Cross-elasticity coefficients between each of the following pairs of products to be positive or negative? Why? 
a. Personal computers and software 
b. Electricity and natural gas 
c. Apples and oranges 
d. Bread and DVRs 
10. What would you expect to happen to spending on food at home and spending on food in restaurants during a decline in economic activity?
How would income elasticity of demand help explain these changes?
11. The U.S. Postal Service has been raising postal rates on a Regular basis. 
The service had been losing money.
One of the reasons is increased competition from companies such as United Parcel Service and Federal Express. 
Another reason is the use of faxes and e-mail, as well as electronic bill payment.
 With this decrease in demand for postal services, why do you think that the Postal Service is seeking a rate increase?