and just concern about the value , the price elasticity of demand and the price elasticity of supply(as a symbol ε) can be classified into three types. When ε >1, it is elastic. When ε <1, it is inelastic. When ε = 1,it is unit elastic. By using the difference of total consumer expenditure(TE) and the total revenue(TR), it can tell the impact magnitude of the impact from market intervention. TE = P × Q . When it is elastic demand, if the price rises, quantity falls proportionately more…
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