Sociology homework questions. can someone help?

Question

Alright so i have to anser these 2 questions for sociology class, and i have no idea.

1. what is it called when people from 3rd and 2nd world countrys come to 1st world countrys for education? (its not immigration, or urbanization.)

2. What is it called when a country doesnt allow there people to have children due to overcrowdenss.?

Answer 1

1. student visa (http://www.unitedstatesvisas.gov/studyin...

2. state mandated population control policy (China's One Child Policy)

Answer 2

for the second one, refer to a question i asked. it's not directly answering the question but their are some interesting things there which will give you something to say.

http://answers.yahoo.com/question/index;...

hope it helps.