Since the partition of Ireland in 1921, economic and social interaction between the two jurisdictions was limited until more recent times.

One effect of partition has been the low number of marriages between people of the two jurisdictions, and since the end of troubles and the signing of the Good Friday agreement, this trend seems to have continued.

So, why then do we not tend to marry northerners?

Joining Seán to discuss is John Fitzgerald, Adjunct Professor in Economics at Trinity College Dublin.