I am about to start my third year in an economics PhD program and I'm starting my dissertation. Part of the dissertation involves subject matter that none of the faculty in the department know enough about to give specific useful feedback.
I want to ask faculty (who I know are knowledgeable) from different departments/universities for some basic feedback on my current progress before plunging more into the research topic blindly (with only my understanding of the literature to guide me).
I'm thinking I will ask my current committee members to introduce me to anybody they know who might be helpful. If they don't know anyone I will consider cold-emailing.
So my question is:
Is my current plan a bad idea and is there a preferred alternative approach?