Every year, the American Marketing Association creates a nice report that lists the Marketing PhD students that have finished their
programs and where they will be spending years and years as professors or researchers. This is called the Who Went Where report and the website has the information from 2003 to 2015.
It's very valuable information to possible candidates to PhD programs, as it will give you a sense of the potential target schools you will have at the end of the program. It is also quite relevant for current Marketing PhD students, as you can see what schools produce your closer competitors. Here is the report on the placement of Marketing PhD Students from 2015.