the graph below illustrates a binding price ceiling in both the long and short run. we can see that the shortage caused by the binding price ceiling is larger in the long run than it is in the short run. another effect of binding price ceilings is the emergence of a black market. the price of the good in the black market can be found using a supply and demand diagram. first find the black-market price in the short run for this market. then find the black-market price in the long run for this market. what happens to the black-market price between the short run and the long run?