Ah okay. I am trying to update the Publications section with working papers that are not published. Here is the link:https://mattmcketty.com/research/. I renamed publications to research but the underlying files are the same. Is there a way I can hide the date in publications and the "Published in"? Or just exclude them.

I also see now that when my file name does not include a year and date the published date defaults to 1900.

The template has a lot of the same design philosophy as a CV, so the expectation is that publications should have a date associated with them and that's incorporated into the code that produces the citation. The Portfolio section is a bit more flexible since it doesn't need to have a date associated with it. The Wiki has a bit more detail on this topic.

Ah okay. Is it advisable for us to add our own collections, or will that likely break the code? I don't see anything in the wiki mentioning that specifically

Adding collections is fine, the Wiki has a bit about them. At some point I need to write a bit more about how they work.