"To estimate the impact" means to make an educated guess or calculation about how something will affect or influence a situation or outcome. Full definition
These are much better choices than «growth - to - proficiency» models, which do not estimate the impact of schools and again mostly measure who is enrolled. (educationnext.org)
This report presents estimated impacts on the program's targeted outcomes about one year after couples entered the study. (mdrc.org)
It also estimates those impacts for each of the 50 states. (tradepartnership.com)