Economic Impact for duration of 20 years

Hi Kathlleen. Thank you for your post. Our recommendation is to Not use the software to make impact predictions 20 years out. The most we recommend for extending out your study is 5 years. The reason for this is that of change, with technologies, industries and communities changing, it is hard to predict that the economy now will be the same in 20 years. Could you provide us with some additional information as to what you are trying to accomplish? I also recommend the following link: https://implan.com/index.php?view=download&alias=230-appendix-h&category_slug=version-three-files&option=com_docman&Itemid=1480 and looking into the section on Deflators. Thanks!