Why have wealthy countries increasingly opened their borders to international trade, but not immigrants?
Dr Maggie Peters (Associate Professor at UCLA) suggests that trade openness has enabled firms to offshore production to cheap labour locations. This has reduced their incentive to lobby for low-skilled immigration back home. Without strong business support, the immigration lobby has become weaker.
Forms of economic openness are thus interconnected: trade and immigration. This is shown through methodological triangulation.
Buy the book here: https://press.princeton.edu/titles/11040.html
Learn about Dr Peters' work here: https://polisci.ucla.edu/content/margaret-peters