How to explain detail the output result.

 

The final Hessian matrix is not positive definite although all convergence criteria are satisfied. The MIXED procedure continues despite this warning. Validity of subsequent results cannot be ascertained. Fixed Effects Intercept Age Random Effects Intercept + Age -2 Log Likelihood Akaike's Information Criterion (AIC) Model Dimension Bozdogan's Criterion (CAIC) Number of Levels Schwarz's Bayesian Criterion (BIC) Hurvich and Tsai's Criterion 1293919.174 (AICC) 1293909.174 1293919.174 1293969.909 1 1 2 Residual Total 4 a. Dependent Variable: Total salary & wages received in reference month. b. As of version 11.5, the syntax rules for the RANDOM subcommand have changed. Your command syntax may yield results that differ from those produced by prior versions. If you are using version 11 syntax, please consult the current syntax reference guide for more information. Information Criteria 1293964.909 Covariance Structure Variance Components Number of Parameters The information criteria are displayed in smaller-is-better form. a. Dependent Variable: Total salary & wages received in reference month. 1 1 2 1 5 Subject Variables Industry