Before revision:  The empirical research of these two points would lead to early warning of economic crisis  .
After revision:  The empirical research of these two points would lead to early warning of economic crisis . Moreover, it is a surprise that the state of economic crisis would be a feasible equilibrium within the framework of the Arrow-Debreu model. That means that we can not understand the origin of economic crisis within the framework of modern economics, for example, the general equilibrium theory .