Textbook Edition Question/Good Resource to Compare Editions

[LaterBloomer]

Try going to the publisher's web site, and looking up the newest text. Sometimes they'll give a summary of the changes, or show the introductory material for the textbook, and that will list the changes. From that you might be able to ascertain if the edition changes are significant. In the dark ages when I took macro, the newest text had trickle down economics. I ended up going to the library and copying those pages for the newest version. The library had on reserve. I saved myself $. Good luck.