Dr. Armando wants to study sex workers' concerns about their personal safety. She begins by contacting three sex workers through an online ad and invites them to participate in an interview. She then asks the sex workers to recommend other sex workers they might know to serve as participants in the research. What kind of sampling is Dr. Armando conducting?

Locate an article online from a news source that illustrates at least one determinant of supply. write a summary of the article, list the determinant(s) that were discussed in the article, and give a brief explaination of the effect of the determinant(s). you don't need to write the entire thing out, just find a source and tell me what i should include. i'm not the best at some parts of economics, and this is one of the parts i suck at.