leidenuniv 發(fā)表于 2009-12-25 21:00
一般來說,對(duì)各數(shù)據(jù)取對(duì)數(shù)之后不會(huì)改變數(shù)據(jù)的性質(zhì)和關(guān)系,且所得到的數(shù)據(jù)易消除異方差問題;同時(shí),取對(duì)數(shù)以 ...
請(qǐng)問可以只對(duì)解釋變量和被解釋變量取對(duì)數(shù)嗎?控制變量不取對(duì)數(shù)。另外還想問一下,如果取了對(duì)數(shù),我的模型是不是也應(yīng)該是用對(duì)數(shù)表示?