The academics said a lack of certainty over contracts - which can vary from a few months to several years - has had a detrimental impact on their relationships and living arrangements and has prevented some from having children
This chart shows the number of pupils resident in the Republic of Ireland who attend primary and post-primary schools in Northern Ireland. It also portrays the number of primary and post-primary pupils with an address in Northern Ireland attending schools in the Republic.
Department of Education Northern Ireland and Department of Education and Skills (Ireland): 2017/18 school year