Describe the different ways in which policy models are used.  What are the key lessons for policy modeling, according to this paper? Based on the examples that are provided, do you agree that these models would be useful? Please explain why or why not.

Please make sure that you make at least a 500 hundred word main posting. As always please make sure that all references are cited properly. 

You want to read the article and then go over it again. Pay particular attention to the examples of policy models and the problems that they are solving for, these are clear examples of how modeling is used in public policy.