The market consist of free individuals and other legal entities engaging in voluntary exchange.
A corporation can live forever as opposed to any individual, and can also be dissolved. In case of a limited corporation, it does not have to pay its debt.
A state is obviously also immortal, has monopoly on violence, and can impose taxes. The violence part seems contrary to free as in free market. Can a state be regarded as a form of corporation, or is it some other kind of animal entirely?
yes modern states are registered corporations. you can look them up on
http://www.dnb.com/