In the absence of any government intervention what is the equilibrium level of security that airlines will supply? Using the diagram, denote this level, _Q_*. Briefly explain why this quantity is not the economically efficient level of aviation security.

In the absence of any government intervention what is the
equilibrium level of security that airlines will supply? Using the
diagram, denote this level, _Q_*. Briefly explain why this quantity
is not the economically efficient level of aviation security.