Since, you have completed you MBA in Marketing; you can opt for Doctoral program in the same field. Ph.D in Marketing students learn customer behaviour that is mainly psychology based and quantitative modelling that is largely based on economic and statistical theories.
There are many colleges offering Ph.D in Marketing program in India such as-
• Loyola Institute of Business Administration
• S.I.E.S College of Management Studies
• Indian Institute of Management, Bangalore
• Indian Institute of Pharmaceutical Marketing, Lucknow
• Infinity Business School, Gurgaon
• Jaypee Business School, Noida
You can choose any of these colleges as per your preferences. You can compare colleges by using our Compare College Tool
More colleges offering Ph.D in Marketing
All the best !!