求助 截面数据自相关
我做的是关于销售价格与过往销售件数的回归分析:以下是结果:
其中vendor_price是成本,T7 是指7天内卖出的件数,同理,T30是30天内,T90 是90天, Age_270 是库存超过270天的件数,Age_365 是库存超过270天的件数
我有几个问题:
1 R2是不是偏小?
2 如何检查是否具有自相关? 我试了用DW检验,结果只有0.6,是不是我的model严重的自相关呢? 有什么解决的办法呢?
http://www.mysas.net/forum/forum.php?mod=image&aid=284&size=300x300&key=4b93c4e457007f76&nocache=yes&type=fixnone
多谢大家了!!!
T7, T30 and T90 should be hightly correlated. Use only one of them or summeriasie them to one variable. All you may think the other way: price is your predictor, number of sold products as the outcome, then use mixed model (repeated measurements) where is my response?
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