According to economic reasoning, you should follow Nike's advice and "Just Do It" when

Hospitals typically include all their sunk costs when deciding how much it costs them to provide services because

A) each patient benefits from the hospital's being adequately equipped. B) hospital administrators have no incentive to be efficient. C) no hospital could continue operating if it wasn't able to cover its sunk costs. D) the payments they receive are largely based on what they say are their costs. E) they are non-profit institutions and hence are in general poorly managed.

A person's marginal tax rate equals

a. her tax obligation divided by her average tax rate. b. the increase in taxes she would pay as a percentage of the rise in her income. c. her tax obligation divided by her income. d. the increase in taxes if her average tax rate were to rise by 1percent.