They bring people together to achieve control of thr government,develop policies favorable to their interests or the groups that support them.They also organize and persuade voters to elect their candidates to office.
This might help! :-)
http://www.loc.gov/teachers/classroommaterials/connections/slavery/file.html
I know that caemon's Hymn is a short Old English poem originally composed by Caemon, i also know that <span>an illiterate cow-herder who was able to sing in honour of God the Creator, using words that he had never heard before.</span>
to defend against the acts against the laws of war.
Econometrics puts much more emphasis on estimating parameters of structural models. Statistics is more nonparametric, mostly because the applications are much more varied.