Before revision:  Our model resembles the strong degree of heterogeneity observed in empirical data and the parameters of the model can easily be fitted to market data . We derive asymptotic results that, based on these parameters, allow to determine the impact of local shocks  to the entire system and the wider economy.
After revision:  Our model resembles the strong degree of heterogeneity observed in empirical data and the parameters of the model can easily be fitted to real data sets. One of our main results allows us to determine the impact of local shocks to the entire system and the wider economy.