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計量經濟學理論/解決多重共線性
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Econometric Theory
製作複合變數，將相關的解釋變數形成變數
移除與其他變數相關的解釋變數
刪除冗餘變數，適用於公式中的兩個或更多個變數本質上測量相同內容的情況
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書籍：計量經濟學理論
華夏公益教科書
