I've written before on this blog about how academic research can be very beneficial to genealogists, but can sometimes not be thought of as a potential source of relevant information or records. Therefore, I'd like to take another opportunity to highlight a useful and interesting piece of academic work.
Getting Their Share: Irish and Italian Immigrants in Hartford, Connecticut, 1850-1940 is the PhD thesis of Bruce Alan Clouette. It was submitted in 1992 at the University of Connecticut. A recent publication considers it to be the most definitive work on Irish immigration to Hartford, CT in the mid 19th century.
Works of this magnitude can be particularly useful when they are about just one city, as opposed to the many academic tomes which have focused on the immigration of Irish people to the whole of the U.S. Individually named immigrants, migration patterns from Ireland, settlement patterns in the city, Catholic Church history and many other useful types of genealogical information can be found in the more locally focused publications.
You can read the abstract here.