Ajit Ranade in The Hindu
Economist Intelligence Unit
BBC
Concerns of India’s manufacturing states – A Sarvar Allam in Economic and Political Weekly

Regional economic integration is something usually associated with international trade blocs – the European Union, ASEAN, and so forth. But two of the most important cases aren’t international – they are happening within India and China. Both countries are more populous than any international “region” (excluding of course regional groupings which include either India or China), and both have had very poorly integrated national markets, for reasons to do both with internal transport infrastructure, and the protection of sub-national markets by various means.

Global economic integration – quick, and institutionally shallow – is the hare; regional integration is the tortoise.