Your scientific method of economic data collection is impressive.
At topic - India's interest in BD is from a security point and for the north east states. What can India offer in return, access to our market and road access to other states.
The biggest problem in realising this is the really low quality politics in BD that uses the indian bogeyman. BTW while the current govt has helped to crack down on armed forces operating out of BD against India, the previous one actively helped funnel trouble in India. Those religiously motivated people are still a force in BD and as such from a security viewpoint India can not lower its guard.
Dont u think we deserve water share and solve land related disputes.