Before revision:  While the simple model agrees well with market data on long time scales, it cannot explain the observed market trends over time horizons from one month to one year. In a next step, the approach should therefore be extended to other models of critical dynamics and to general network topologies.
After revision:  While the simple model agrees well with market data on long time scales, it cannot explain the observed short-term auto-correlations, the model should be extended beyond the critical domain, to other network topologies, and to other models of critical dynamics and to general network topologies.