Most common departmental structure for degrees in EE, CE, and ECE The acronyms are Computer Engineering (CE), Electrical Engineering (EE), and Electrical and Computer Engineering (ECE). Currently, my Department is ECE, and we offer two degrees within the same departmental structure. 

As a result of some political issues, I have been asked to find out what is "best practice", i.e., what "most" Universities do. After googling around, I was able to find several departments that pursue each of the possibilities: 


separate departments (CE and EE) offering separate degrees, 
single departments (ECE) offering degrees in both CE and EE, and 
single departments offering one degree that encompasses both fields. 


My question is if there is any survey, overview, or summary that would shed light on how common these various options are (preferably in a quantitative way).
CE program has actually been formed to address the digital-electronic-driven technologies, considerably, related to the computer technology, such as computer architecture, parallel processing, VLSI, CAD, etc. 

EE program points to the electrical-driven stuffs like power engineering, analog electronics and semi-conductors, telecommunications and so on.

ECE program would often be considered as a mixture of the above cases. As a matter of fact, some minor interdisciplinary programs like robotics, neural engineering and bio-medical engineering could be covered under the aegis of such program.

Above clarifications might be fuzzy and even interchangeable in many cases. One could contend that the applicant must opt among the aforeaid programs, solely, based on the faculty members' research, are who affiliated with the responsible department of each program, are which mostly-aligned with his/her interests.