请问有人知道下面文章的算法是什么吗？因为作者给的CODE实在太晦涩难懂实在看不出来。。。。

Learning in a medium-scale DSGE model with expectations based on small forecasting models  
By SERGEY SLOBODYAN AND RAF WOUTERS

Shocks and Frictions in US Business Cycles: A Bayesian DSGE Approach

By FRANKS METSA NDR AFAELW OUTERS*