Very briefly, my graduate studies at Harvard were a little over 30 years ago. The focus in constitutional matters, as you can imagine back then, was the Canadian Charter of Rights and Freedoms. This was the mid-1980s, and everybody with an interest in public law was particularly focused on human rights and constitutional guarantees for civil liberties. That was the focus of my studies back then.
I wrote my masters thesis at Harvard on the scope of section 1 of the Canadian Charter of Rights and Freedoms and possible interpretations of limitations to rights as flowing from section 1. I should say that this piece was written well before the Supreme Court jurisprudence evolved on section 1, and has become obsolete 30 years after the fact.
After this, I really kept my focus on private law for the longest time, until I went as the executive legal officer of the Supreme Court of Canada, where I had the opportunity to work on constitutional matters, both in relation to charter issues and in relation to the division of powers and institutional aspects of the Constitution.
Since that time, I've kept my interest in and read widely in this area, even though I don't now publish or engage in research in this area.