Alex is practicing her college interview for Princeton in the mirror when Haley comes in to style her hair. Princeton is an Ivy League school that is very prestigious and gets a lot of applications. Princeton does not know which applicants it should let in so it screens them. Screening is an action taken by an uninformed party in a situation characterized by adverse selection. There are many things that colleges do to screen applicants. They require high school transcripts, a certain GPA, test scores and they conduct an interview. When someone is interviewed, it’s an opportunity for them to send a signal. A signal is an action taken by an informed party in a situation characterized by adverse selection. Alex wants to signal to Princeton that she’s a good candidate for admission into the university. Haley shares her thoughts about the message that Alex is actually sending.