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CPIt = ¥á1+¥â0M2t+¥â1M2t-1+¥â2M2t-2+¥â3M2t-3+¥â4M2t-4+Ut
CPIt = ¥á2+¥â0MPt+¥â1MPt-1+¥â2MPt-2+¥â3MPt-3+¥â4MPt-4+Ut
CPIt = ¥á3+¥â0PPIt+¥â1PPIt-1+¥â2PPIt-2+¥â3PPIt-3+¥â4PPIt-4+Ut
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