The following matrix shows the outcomes for Ford and Chevrolet when they do and do not offer rebates on their best-selling trucks, the F-150 and the Silverado. A Payoff matrix table for Ford and Chevrolet is shown. If Chevrolet does not offer a rebate and Ford does not offer a rebate, then Chevrolet earns a $10 billion profit and Ford earns a $10 billion profit. If Chevrolet does not offer a rebate and Ford offers a $3,000 rebate, then Chevrolet earns a $6 billion profit and Ford earns a $14 billion profit. If Chevrolet offers a $3,000 rebate and Ford does not offer a rebate, then Chevrolet earns a $14 billion profit and Ford earns a $6 billion profit. If Chevrolet offers a $3,000 rebate and Ford offers a $3,000 rebate, then Chevrolet earns a $7 billion profit and Ford earns a $7 billion profit. Suppose Chevrolet and Ford know they will compete for many years. If they both play tit for tat, then at least initially: both firms will earn $7 billion in profit every year. both firms will sometimes earn $10 billion but sometimes earn $7 billion depending on the year. we cannot tell what will happen. both firms will earn $10 billion in profit every year