81.   The reason for this is probably that it implies oligopolies that behave in a way intermediate between perfect competition and monopoly.

82.   The reason for this is quite simple.

83.   The reason for this is that any deterioration in performance will represent a significant problem.

84.   The reason for this is that government output is determined on the basis of a simple majority vote model.

85.   The reason for this is that the amount of water used for personal hygiene is reduced.

86.   The reason for this is that the renewal of fixed capital is normally to maintain existing production levels.

87.   The reason for this was the bright point of light that had popped into existence a few feet from his eyes.