We view the benefits of immigration as myriad:

Immigration brings entrepreneurs who start new businesses that hire American workers.
Immigration brings young workers who help o set the large-scale retirement of baby boomers.
Immigration brings diverse skill sets that keep our workforce exible, help companies grow, and increase the productivity of American workers.
Immigrants are far more likely to work in innovative, job-creating elds such as science, technology, engineering, and math that create life-improving products and drive economic growth.

This is from “An Open Letter from 1,470 Economists on Immigration,” published today. Among the singers are co-bloggers Bryan Caplan and Scott Sumner, and I.