Both demand and supply of hamburgers would plummet in short run, as would be quantity sold, however we can’t be certain how the price would adjust when: (i) 75 % of the population became serious vegetarians. (ii) People abruptly decreased their intake of milk products. (iii) A wave of Mad Cow disease swept across the world. (iv) 90 % of all dieters switched to a high-protein low-carbohydrate Atkins diet or the South Beach diet.
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