policy arena?

hxq2007

这是一篇讨论民主国家和非民主国家在政策上的差异的文章
1.
However, we do find differences in another policy arena, namely those
relating to the process of winning and maintaining public office.
请问policy arena应该要怎么翻?

2.
At the other extreme from formal voting theory are positive theories
of public policy where efficiency is the main determinant of public policy.
请问positive theories应该翻成\"有建设性的理论\"吗?
还是有更好翻译?

3.
Some studies modify formal voting model in order to relax some of the three
tenets(and may go far as to conclude that only efficient policies have
electoral success!)
请问括弧中的go far as to是什么意思呢?