Western europe and byzantine empires (300-1200)?

Question: Western europe and byzantine empires (300-1200)!?

How were the two empires similar in the field of trade&economics!?

thanks guys!Www@QuestionHome@Com

Best Answer - Chosen by Asker:

they were the one and same empire from 330 to 1054!.
The great schism happened in 1054 due to religious and political differences!.

http://en!.wikipedia!.org/wiki/East-West_S!.!.!.
http://en!.wikipedia!.org/wiki/Byzantine_e!.!.!.
http://www!.vlib!.us/medieval/lectures/tow!.!.!.Www@QuestionHome@Com