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是統(tǒng)計(jì)學(xué)、經(jīng)濟(jì)理論和數(shù)學(xué)三者的統(tǒng)一。計(jì)量經(jīng)濟(jì)學(xué)綜合應(yīng)用理論、統(tǒng)計(jì)和數(shù)學(xué)方法,以經(jīng)濟(jì)理論、統(tǒng)計(jì)學(xué)和數(shù)學(xué)為基礎(chǔ),通過(guò)數(shù)學(xué)符號(hào)和公式來(lái)表達(dá)經(jīng)濟(jì)現(xiàn)象和規(guī)律。