Yes, she is an immigrant and know what she is talking about, unlike you. You don't bother to say which study you are referring to but there are many other studies showing that immigrants are a huge net economic benefit and you would probably not have a job if it were not for the creative and engineering work done by immigrants. My own company is about 50% immigrants, as are most innovation companies. These people are not taking jobs from people, they are creating jobs for people.