Articles about chain migration have three common characteristics:
1) They are presented as thoughtful, in-depth discussion of the topic;
2) They are quick to arrive at conclusions and hammer then in repeatedly;
3) They are extremely sparse in details.
You can read a hundred such articles without understanding what percent of legal migration is due to chain migration, what exactly is chain migration, and how it works. But when you are done reading this article, you will be such an expert that all your friends will turn to you for advice and succor on the subject.
Let’s look at total legal immigration in 2015, courtesy of the Center for Immigration Studies: