Transfer ownership of in app purchases to new email address? I made some in-app purchases a year ago with email address foo@foo.com.

I have since changed my email address to new@new.com. Is there any way that I can transfer my purchases from my old email address to my new email address in the Google Play app?
No there is no official way to transfer purchases from one account to another. You could contact the Google Services to maybe figure out a way if you had a good reason which you could explain.

There is a Reddit thread regarding this topic if that is any help.