Would we hyphenate 'part-time' / 'full-time' as an adverb?
1. Joe worked part-time as a waiter and full-time as a computer programmer. (Can we omit the hyphens in these adverbial uses?)
2. Mike said, "Joe is part-time." (Meaning Joe is a part-time associate. Should we keep the hyphen in this construction?)
3. Joe is a part-timer. (Meaning that Joe is an associate who works part time. Should we keep the hyphen in "part-timer"?)