RT Journal Article SR Electronic T1 Labor Market Effects of Open Borders JF Journal of Human Resources FD University of Wisconsin Press SP 434 OP 468 DO 10.3368/jhr.0321-11546R2 VO 60 IS 2 A1 Kuosmanen, Isa A1 Meriläinen, Jaakko YR 2025 UL http://jhr.uwpress.org/content/60/2/434.abstract AB The eastern enlargement of the EU differentially exposed workers in different regions and occupations in Finland to a foreign workforce, in particular to posted workers. Using a triple-differences strategy and detailed individual-level administrative data, we document robust evidence that the entry of new EU countries decreased the annual earnings of vulnerable workers relative to less vulnerable workers in the construction sector. This decrease was persistent even ten years after the enlargement and economically meaningful, about 9 percent (roughly a month’s salary per year), on average. We also show a small increase in unemployment and provide evidence on different adjustment mechanisms.