Analysis of Maximum Likelihood Estimates
ParameterDFEstimateStandard
ErrorWald
Chi-SquarePr > ChiSq
Intercept1-7.62003.07306.14890.0131
auditorchange00...
ROA10.0004280.001210.12480.7238

因变量和主要的自变量（

auditorchange

）都是dummy variable，用的logistic，出现了自由度为0，得不到结果，请教这种问题可能是什么造成的？谢谢