This paper argues that in the presence of intersectoral input-output linkages, microeconomic idiosyncratic shocks may lead to aggregate fluctuations. In particular, it shows that, as the economy becomes more disaggregated, the rate at which aggregate volatility decays is determined by the...

This paper shows that a production network facilitates expectations-driven business cycles. Through input-output linkages, changes in expected demand can cause business-cycle fluctuations and endogenous movements in the Solow residual. When inputs must be purchased one period in advance,...

This paper argues that, in the presence of intersectoral input–output linkages, microeconomic idiosyncratic shocks may lead to aggregate fluctuations. We show that, as the economy becomes more disaggregated, the rate at which aggregate volatility decays is determined by the structure of the...

We model the production of complex goods in a large supply network. Each firmsources several essential inputs through relationships with other firms. Due to the risk of suchsupply relationships being idiosyncratically disrupted, firms multisource inputs and strategicallyinvest to make...

This paper studies information transmission in opaque networks with uncertain inter-firm linkages. Local traders can identify their firm's direct neighbors but are unsure about these firms' linkages to other firms. This uncertainty renders the neighbors' prices difficult to interpret and leads...

Using panel household survey data from rural Ethiopia, we investigate informal risk sharing against health shocks in the presence of multiple risk sharing networks. We find that neither short-term nor long-term health shocks are insured through transfers from networks such as friends, neighbors,...