<p>我的Hausman检验结果如下：</p><p>chi2(3) = (b-B)'[(V_b-V_B)^(-1)](b-B)<br/>                          =       53.92<br/>                Prob>chi2 =      0.0000<br/></p><p>该拒绝还是接受原假设？是固定还是随机效应？一般卡方值多大该拒绝或者接受？</p><p></p><p>还有就是我的检验结果上老是有个note : the rank of the differenced variance matrix (3) does not equal the number of coefficients being tested (5); be sure   this is what you expect, or there may be problems computing the test.  Examine the output of your estimators for  anything unexpected and possibly consider scaling your variables so that the coefficients are on a similar scale.<br/>函数形式有问题？？</p>