well,indian economy may be bigger than pakistan.But no economy even american economy can survive a nuclear war.If u believe pakistan capabilities ,how ever small they may be but they have handful of nukes who they will through at our metros.So if u live in metros ,it wd be ur worst(say last) nightmare,forget measuring economy after a nuclear aftermath.Sure pakistan wont exist after our retaliation, but i care more about our own peoples lives.So forget war,ppl of both nation should do everything to avoid even an accidental nuclear mishap.Trust me you dont want to see a nuke fumes in ur neighbourhood,even a small & crude one.