Considering finland for ppst graduation

Hi i m totally new to such forums infact writing first time to such forum,i am willing to seek admission in finland for my post graduation.
Please suggest me what are the popular fields and universities that are relayed to commerce economics and business and accordingly which courses are most advantageous?
Also i wanted to know that will i be able to permanently settle after completing my studies if i get a job because i recently heard that some countries ask you to get back to your own country after studies?
Please suggest and help
Many thanks.

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