How do developed countries maintain an advantage over developing
countries in international trade?

They maintain high tariffs on the agricultural goods that many developing countries export. Workers are going to developed countries in search of better-paying jobs.

hello,

i'm not so sure but i hope this in anyway.

the president of russia is head of state, and of a multi-party system with executive power exercised by the government, headed by the prime minister, who is appointed by the president with the parliament's approval.

hope this : )