http://web-app.usc.edu/ws/soc_ar ... ition_and_fees.html
21K for one semester, 42K for two, a normal price for a US MS.
for comparsion:
US is around 60-70K USD for 3 semesters
UK is around 20-25K GBP for 1 year
HK is around 160-180K HKD for 1 year
EU is around 11K EUR for 1 year, or 2K EUR for 2 year
Don't dream for scholarship for a master in US.
Tuition from master are income of the department, which is used to pay the bill for their research. The incentive of giving scholarship to attract student is small.
Unless you are really the cream of the corn among all the students, you are very unlikely to get a partial waiver. But if you are the toppest applicant in USC......well, you are very likely to get offer from some other better econ program, say Duke. Which one will you go then?
I will say, if one really need funding, it is more reasonable to ask how much research / teaching assistant opportunities are available for second year master students.