We build a dynamic model where the economy is vulnerable to belief-driven slow-moving debt crises at intermediate debt levels, and rollover crises at both low and high debt levels. Vis-à-vis the threat of slow-moving crises, countercyclical deficits generally welfare-dominate debt reduction policies. In a recession, optimizing governments only deleverage if debt is close to the threshold below which belief-driven slow-moving crises can no longer occur. The welfare benefits from deleveraging instead dominate if governments are concerned with losing market access even at low debt levels. Long bond maturities may fully eliminate belief-driven rollover crises but not slow-moving ones.

We propose a model of posted prices in networks. The model maps traditional concepts of market power, competition and double marginalization into networks, allowing for the study of pricing in complex structures of intermediation, such as supply chains, transportation and communication networks and financial brokerage. We provide a complete characterization of equilibrium prices. Our experiments complement our theoretical work and point to $\textit{node criticality}$ as an organizing principle for understanding pricing, efficiency and the division of surplus in networked markets.

We study heterogeneity in the transmission of monetary shocks across euro-area (EA) countries using a dynamic factor model and high-frequency identification. Deploying a novel methodology to asses the degree of heterogeneity, we find it to be low in financial variables and output but significant in consumption, consumer prices, and variables related to local housing and labour markets. We show that a large proportion of the variation in the responses to monetary shocks can be accounted for by differences in some characteristics of these markets across EA member countries: the share of adjustable mortgage contracts, homeownership rates, shares of hand-to-mouth and wealthy hand-to-mouth consumers, as well as wage rigidity.