二级quant讲义98页写了positive serial correlation not affect the consistency and estimation of regression coefficients.
但是120页写了limitations of trend model: usually the time series data exibit serial correlation,which means that the model is not appropriate for the time series, causing inconsistent b0 and b1.
这两句话似乎有些矛盾，烦请老师和同学解释一下，谢谢！