Abstract. In this era of rapid climate change there is an urgent need for interdisciplinary collaboration and understanding in the study of what determines resistance to disasters and recovery speed. This paper is an economist's contribution to that effort. It traces the entrance of the word "resilience" from ecology into the social science literature on disasters, provides a formal economic definition of resilience that can be used in mathematical modeling, incorporates this definition into a multilevel model that suggests appropriate policy roles and targets at each level, and draws on the recent empirical literature on the economics of disaster, searching for policy handles that can stimulate higher resilience. On the whole it provides a framework for simulations and for formulating disaster resilience policies.
The structure of disaster resilienceResilience is a term with many connotations and definitions in the disaster literature. This paper integrates the components of resistance to and recovery from disaster into a model of resilience. The paper begins by defining resilience formally and introducing a mathematical form for resilience. I then introduce the notion of interdependent resilience layers and place the mathematical form into this layered structure. I identify important evidence in the empirical economic literature that a layered response structure exists. The empirical literature also reveals influence points where outside intervention can improve resilience. I conclude by using some of this empirical evidence to illustrate how the multilayer model would work in the context of financial resistance to and recovery from disaster.The paper is organized in the following manner. Section 1 lays out the intellectual roots of resilience by tracing the migration of its meaning through material science and ecology and by explaining why and how this meaning must be further modified to adequately describe human systems. The first finding is that resilience is a new idea, not just a new word. I demonstrate how it can be defined narrowly enough and with enough technical precision to make it a useful tool for theoretical and empirical studies of disasters.Section 2 develops a formal definition of resilience and sets it within an economic context. The second finding is that resilience is best viewed as a structural characteristic of a multilayered, hierarchical system. Resilience "layers" include individual people and sets of people organized into families, local organizations, businesses, local governments, national governments, and international organizations. All layers have not only their own native resilience capacities but also variable abilities to draw on resources from higher levels in the system. This idea of hierarchically layered resilience is developed into a mathematical framework that can be used for empirical estimation and mathematical simulations. In order to appeal to a wide, multidisciplinary audience, the more substantive technical developments are laid out in separate sections that can be ...