<p>本人用eviews做logit模型分析，结果如下，只出来系数，其他如标准差、统计量、P值都为NA,不知是什么原因，请大侠指点！！！</p><p></p><p>Dependent Variable: DEPENDENT    <br/>Method: ML - Binary Logit (Quadratic hill climbing)    <br/>Date: 03/29/09   Time: 22:15    <br/>Sample: 1 131    <br/>Included observations: 131    <br/>Convergence achieved after 39 iterations    <br/>WARNING: Singular covariance - coefficients are not unique    <br/>Covariance matrix computed using second derivatives    <br/>    <br/>Variable Coefficient Std. Error z-Statistic Prob.  <br/>    <br/>C 1637.127 NA NA NA<br/>EXPERIENCE1 -24.96572 NA NA NA<br/>EXPERIENCE2 0.113727 NA NA NA<br/>HCI 0.630150 NA NA NA<br/>IT 3.449813 NA NA NA<br/>GDP -0.068768 NA NA NA<br/>PGDP -0.051291 NA NA NA<br/>POP -0.104628 NA NA NA<br/>RATIOFDI 42.75348 NA NA NA<br/>YEAR -0.805496 NA NA NA<br/>RESOURCE 1.267700 NA NA NA<br/>    <br/>Mean dependent var 0.824427     S.D. dependent var  0.381917<br/>S.E. of regression 0.336748     Akaike info criterion  0.878288<br/>Sum squared resid 13.60787     Schwarz criterion  1.119717<br/>Log likelihood -46.52786     Hannan-Quinn criter.  0.976391<br/>Restr. log likelihood -60.86431     Avg. log likelihood  -0.355174<br/>LR statistic (10 df) 28.67291     McFadden R-squared  0.235548<br/>Probability(LR stat) 0.001407   <br/>    <br/>Obs with Dep=0 23      Total obs  131<br/>Obs with Dep=1 108   <br/>    <br/></p>