作者ltm2000 (2Pac)
看板Statistics
标题[问题] SAS跑 hausman test的问题
时间Sun Apr 13 00:47:37 2008
在SAS软体跑hausman test的时候
结果有出来
但判定是固定模式或随机模式的两个值
m Value 及 Pr>m
这两个值没出现
而log 给的讯息如下:
NOTE: None of the options FIXONE, FIXTWO, RANONE, RANTWO, FULLER, PARKS,
or DASILVA were
specified. The RANTWO option will be assumed.
NOTE: A negative variance component estimate of -0.07198 was obtained for
cross sections during RanTwo method computations for model statement .
The estimate was set to zero.
NOTE: Hausman statistic can not be computed because the fixed effect
regression does not have
full rank.
请问各位大大
这样是显示啥意思呢?
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