Based on the images at the balance point E is believed to be caused by the intervention from the Government, with the sale price at this level, 1 P. Suppose that the price is too high, consumers have suffered Government need to intervene by means of advanced pricing. 2 P-level, which is at a lower price point balance and what will happen, as it is the shortage of goods due to a manufacturer willing to produce just 1 Q number, but consumers need to buy that amount of Q 2, thus causing the Excess demand. The number is equal to Q 2-Q 1. These situations will affect markets cause problems. (Black market) is to have sale items on hacking the price higher than the price for advanced insurance. Make this policy did not work because the items are not sold in that price level, because the manufacturer has sold goods to smuggle black market, thus causing the product shortages.
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