Economics (NOUN singular) - the study of production, distribution and consumption of goods - takes a singular verb.
Economics (N plural) - the financial element of something -takes a plural verb.
I found these uses : GDP vs. �Happiness�: Economics Are Getting Smarter
In total, economics are maturing and money still can�t buy you love.
Politics - activities associated with government - takes a singular verb.
Politics - power relationships in specific field - sing. or pl. -The politics of education....
Politics - calculated advancement - sing. or pl. - using tactics, strategy to gain power
Politics - Political beliefs - takes a plural verb. - My politics are different from his.