Effective interorganizational collaboration is a pivotal ingredient of any community or nation's capacity to prepare for and bounce back from disruptive crisis events. The booming research field of collaborative public management (CPM) has been yielding important insights into such collaboration that as yet await transfer to the study of crisis management (CM). Also, we argue that the general CPM literature has not sufficiently addressed the distinctive collaboration challenges involved in coping with crises. This article bridges this twofold gap. Based on a systematic review of prior research in collaborative CM, this study identifies dominant areas of theoretical emphasis, methodological practices, and patterns of empirical enquiry. The article highlights areas where CPM research has potential to further inform the understanding of collaborative CM, including performance, success factors, managerial skills, and learning. The article then identifies five properties associated with CM-uncertainty, leadership, magnitude, costs, and urgency-which deserve further analysis to advance the understanding of the application of CPM principles and strategies. We conclude with outlining a research agenda and offering a set of testable propositions aimed at investigating the likelihood of effective collaboration in different types of crises and as expected in different CM paradigms.

While some of the future impacts of global environmental change such as some aspects of climate change can be projected and prepared for in advance, other effects are likely to surface as surprises -that is situations in which the behaviour in a system, or across systems, differs qualitatively from expectations. Here we analyse a set of institutional and political leadership challenges posed by 'cascading' ecological crises: abrupt ecological changes that propagate into societal crises that move through systems and spatial scales. We illustrate their underlying social and ecological drivers, and a range of institutional and political leadership challenges, which have been insufficiently elaborated by either crisis management researchers or institutional scholars. We conclude that even though these sorts of crises have parallels to other contingencies, there are a number of major differences resulting from the combination of a lack of early warnings, abrupt ecological change, and the mismatch between decision-making capabilities and the cross-scale dynamics of social-ecological change.

There is widespread consensus that effective leadership will be required in order to successfully address the climate change challenge. Presently there are a number of self-proclaimed climate change leaders, but leadership is a relationship between leaders and followers. An actor aspiring to be a leader needs to be recognized as such. Despite its fundamental importance for leadership relationships, the demand side of the leadership equation has been comparatively neglected by past research. In this study we are looking for leaders by analyzing the perceptions of climate change leadership among UNFCCC COP-14 participants. Our results show that the climate change leadership mantle will have to be worn by more than one actor. Among the leadership candidates the EU was most widely recognized as a leader, however, only a small minority reported that they saw the EU as the only leader. The data also show that the US and the G77 thus far have failed to impress potential followers and it was China that clearly emerged as the second strongest leadership candidate.

This article probes the warning-response failures that left the city of New Orleans vulnerable to catastrophic hurricanes and the inability of local, state, and federal authorities to mount an adequate response to the consequences unleashed by Hurricane Katrina. Through an empirical exploration with the help of three broad explanatory 'cuts' derived from the relevant interdisciplinary literature -psychological, bureauorganizational, and agenda-political -the authors seek to shed light on the sources of failure that contributed to the various levels of governments' lack of preparedness and the inadequate collective response to a long-predicted, upper-category hurricane. The article concludes by addressing the question of whether the vulnerabilities and problems that contributed to the Katrina failure are amenable to reform.