There's a great TV adaptation of Utvandrarna.

In fact, immigration to Norway from Sweden started already back then. My great great grandfather moved from near Bullaren to Southern Norway in the late 1809's. But then emigrated with most of his family onwards to the US a couple of decades later as Norway was also poor at that time.

What was Norway's way out of the worst of that poverty apart from reduced surplus of people from emigration was shipping, and several of his sons, including my great grandfather ended up working on ships (and my great grandfathers family ended up moving back to Norway, supposedly in part because his wife got tired of the warm summers in Brooklyn...)