微觀經(jīng)濟理論3elasticitytheory-在線瀏覽
2025-07-18 04:28本頁面
【正文】 e of responsiveness. Two words are important here. The word measure means that elasticity results are reported as numbers, or elasticity coefficients. The word responsiveness means that there is a stimulusreaction involved. Some change or stimulus causes people to react by changing their behavior, and elasticity measures the extent to which people react. 5 2. Elasticity of Demand Qd=f( P, I, Pi,Pe… ) PPQdQdEd//???IIQdQdE I//???PiPiQdQdExy //???6 Price elasticity of demand ? The most mon elasticity measurement is that of price elasticity of demand. It measures how much consumers respond in their buying decisions to a change in price. 7 ? The basic formula used to determine price elasticity is: p r i cei n ch an g e p er cen t ag eq u an t i t yi n ch an g e p er cen t ag e?EPPQdQdEd//???8 . If price increases by 10% and consumers respond by decreasing purchases by 20%, the equation putes the elasticity coefficient as 2. The result is negative because an increase in price (a positive number) leads to a decrease in purchases (a negative number). Because the law of demand says it will always be negative, many economists ignore the negative sign. 9 彈性公式 Elasticity formula 弧彈性公式 arc elasticity formula: ΔQ Pa Ed= —— ? —— (a點到 b點的彈性 ) ΔP Qa ΔQ Pb Ed= —— ? —— (b點到 a點的彈性 ) ΔP Qb 10 ?弧彈性公式 (中點公式 ) ΔQ/（ Qa+Qb） /2 ΔQ Pa+Pb Ed = ———————— 或 = — —— ΔP/（ Pa+Pb） /2 ΔP Qa+Qb ?點彈性公式與計算 dQ/Q dQ P Ed = —— 或 = — — dP/P dP Q 11 . ?某雜志價格為 2元時銷售量為 5萬冊，價
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