I wonder whether McDonalds optimize their prices. Probably? Seems like an easy win.
If so, the answer might be that McDonalds price the items this way because empirically this is what yields optimum profit — and nobody knows a deeper answer.
In fact even if the pricing model was suggested by someone based on a psychological theory, if the empirical finding was that it was worse, the change would be reverted. So, even if a human suggested the change, they could be only accidentally right --- and again, nobody would be able to tell you the truth of this.
If so, the answer might be that McDonalds price the items this way because empirically this is what yields optimum profit — and nobody knows a deeper answer.
In fact even if the pricing model was suggested by someone based on a psychological theory, if the empirical finding was that it was worse, the change would be reverted. So, even if a human suggested the change, they could be only accidentally right --- and again, nobody would be able to tell you the truth of this.