The Executive DBA and a Ph.D. are similar in a few ways, but also differ in terms of program length, structure, candidate profile, curriculum, and expected outcomes. The Executive DBA was created with senior-level managers, c-suite executives, and professionals with extensive experience in mind.
Dr. David Bishop, Georgia State University Doctorate in Business Alum, gives highly useful presentation about publishing research in book form. David recently published his fourth book. It is titled, Metagility: Managing Agile Development for Competitive Advantage.