Anybody who lobbies represents a special interest. Person keeps track of all regulation coming down the track. Public affairs personnel may perform both of these jobs. Fund raising and membership drives, e.g., public television and radio drives, join for money. Job needs people who like deadlines, are good at logistics, good at working with other people, and who can put up with frustration.
Some functions use little research, some a lot.
Evidence based on survey of PR practitioners. This is the modern PR person and category includes more women. Oriented to the right now time frame. The above roles are most mentioned by communication managers, describe what they do most of the time. Some people only do media relations and some communication liaisons, i.e., work with community relations, e.g., set up outside appearances by company employees.