After Telengana now UP CM has come in support of smaller states.

Does creation of smaller states leads to speedy development? Is it
that bigger states have become unmanageable because of area or
population size? Or is it that more officers per unit area/per unit
population enhances efficiency of service delivery?

Are there any statistics available to support such assertion? Some
sort of cost benefit analysis? Expenditure on creation of state
(infrastructure, extended bureaucracy, smaller districts etc) and
improving social economic indicators, in a given period?

Some variant of Keynesian economics, huh!