We consider a model of network interactions where the outcome of a unit depends on the outcomes of the connected units. We determine the key network link, i.e., the network link whose removal results in the largest reduction in the aggregate outcomes, and provide a measure that quantifies the...

Using a gravity-like approach, we study how Covid-19 deaths and lockdown policies affected countries' imports from China during 2020. We find that a country's own Covid-19 deaths and lockdowns significantly reduced its imports from China, suggesting that the negative demand effects prevailed...

The development of a new global health architecture in the wake of Covid-19 will require important decisions to be made, especially when it comes to negotiating a pandemic accord and creating robust supply chains. Against the backdrop of their systemic rivalry, the US and China view global...