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"Hoffmann, Matthew J"
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Multi-Agent Systems for the Simulation of Land-Use and Land-Cover Change: A Review
This article presents an overview of multi-agent system models of land-use/cover change (MAS/LUCC models). This special class of LUCC models combines a cellular landscape model with agent-based representations of decision making, integrating the two components through specification of interdependencies and feedbacks between agents and their environment. The authors review alternative LUCC modeling techniques and discuss the ways in which MAS/LUCC models may overcome some important limitations of existing techniques. We briefly review ongoing MAS/LUCC modeling efforts in four research areas. We discuss the potential strengths of MAS/LUCC models and suggest that these strengths guide researchers in assessing the appropriate choice of model for their particular research question. We find that MAS/LUCC models are particularly well suited for representing complex spatial interactions under heterogeneous conditions and for modeling decentralized, autonomous decision making. We discuss a range of possible roles for MAS/LUCC models, from abstract models designed to derive stylized hypotheses to empirically detailed simulation models appropriate for scenario and policy analysis. We also discuss the challenge of validation and verification for MAS/LUCC models. Finally, we outline important challenges and open research questions in this new field. We conclude that, while significant challenges exist, these models offer a promising new tool for researchers whose goal is to create fine-scale models of LUCC phenomena that focus on human-environment interactions.
Journal Article
Ozone depletion and climate change
Matthew J. Hoffmann explores the fundamental question of who should participate in the global response to ozone depletion and climate change. Blending social constructivist theory with insights from the study of complex adaptive systems, Hoffmann develops a unique framework for understanding the emergence and evolution of participation norms, which define the appropriate global response and shape how states have perceived the problems, defined their interests and strategies, and pursued governance. The explanation is rigorously developed through an innovative combination of formal analysis and in-depth empirical case studies. Agent-based computer simulation modeling is employed to explore essential norm dynamics, analysis that is complemented and extended by process-tracing case studies that examine governance activities from 1986 through 2003. The result provides the understanding necessary for improving global responses to environmental problems.
eBook
Is Constructivist Ethics an Oxymoron?
Constructivism is often invoked in calls for a turn toward ethics in the practice of International Relations scholarship. Yet, while constructivists rely on norms and ethical ideas in their explanations of world politics, the theory or approach actually fails spectacularly in providing fundamental notions about what is right or ethical in world politics. In this article I interrogate the paradox that, while constructivists provide a prominent place for morals and ethics in their explanations of world politics, constructivism is agnostic on what those morals and ethics should be. I then inquire into the source of ethics in international relations theory more generally, arguing that the ethical commitments of international relations theories are found in the theories' basic assumptions. Finding a fundamental qualitative difference between constructivism and other international relations theories relative to core assumptions, I discuss what constructivist ethics consists of and I turn inward to reflect on the ramifications of the discussion for personal ethics for a constructivist.
Journal Article
Darwin's Finches or Lamarck's Giraffe, Does International Relations Get Evolution Wrong?
Following the recent 150th anniversary of the publication of The Origin of Species, we are in the midst of a surge of Darwinian models of social change in international relations and even genetic and sociobiological analyses of politics more generally. But does being correct biologically make the Darwin/Mendel synthesis an appropriate model of change in world politics? This is an open question and one made interesting by the existence of multiple discarded models of biological evolution, most prominent among them being Lamarck's model of inheritance of acquired characteristics. So we can also ask, conversely, does being incorrect biologically disqualify a model for use in international relations? In this article, we explore this question by examining the challenges of evolutionary analysis and analyzing Lamarckian evolution side by side with Darwinian evolution. If IR is to pursue evolutionary analysis, we argue that Lamarck deserves a second look.
Journal Article
From Rio to Rio and Beyond: Innovation in Global Environmental Governance
The 1992 Earth Summit in Rio de Janeiro unleashed new energy in environmental governance, engaging actors beyond the state and across scales, from local to global, from communities to large transnational networks. In this paper we argue that this expanded pluralism has contributed to a remarkable array of governance experimentation and innovations for the environment. The impact and legacy of Rio thus goes far beyond the formal agreements that emerged in 1992. We explore why Rio had this effect by examining the context within which Rio took place and the dynamics that it served to catalyze. We close by discussing the need to generate processes that lead to coordinated innovations. Such a reorganization of the global governance space could start a new legacy of collective wondering and multiple pathways to a greener future.
Journal Article
Just Scraps of Paper? The Dynamics of Multilateral Treaty-Making
Despite its importance in the global system, the literature provides little guidance on how treaty-making emerged as a well-accepted practice. In either assuming the appropriateness of treaty-making (and then analysing design) or treating treaties as strategic choices in the pursuit of gains (without analysing how treaties came to be a way to pursue gains), the current literature discounts the emergence and evolution of treaty-making. This lacuna contributes to a biased view of treatymaking as the epiphenomenal result of specific, ahistorical factors, rather than as a patterned, historical practice. We contend that the evolution of the practice of treaty-making is significant for questions of design/compliance, the future of multilateral interaction and global order. In addressing this concern, we pursue two linked goals. The first is self-consciously descriptive. We introduce a dataset of multilateral treaties that provides a novel picture of treaty-making across time, space and issue-areas. The second goal is explanatory. We develop and test a social constructivist and path-dependent explanation for the patterns of treaty-making evident in the data, especially 150 years of exponential growth, the spread of treaty-making across multiple issues and the diffusion of the practice across the world.
Journal Article
Making and Remaking the World for IR 101: A Resource for Teaching Social Constructivism in Introductory Classes
Social constructivism is now the main theoretical challenger to established perspectives within the discipline of international relations. Unfortunately, the contributions and standing of constructivist approaches in the discipline are not mirrored in undergraduate textbooks for introductory international relations courses. In this article, we present a lecture template containing a broad synthesis of the main tenets of constructivist thought and discuss how constructivism approaches patterns and phenomena of world politics. The lecture is framed by comparing constructivism with the generally statist treatment that topics receive in mainstream international relations as exemplified by neorealism and neoliberalism. This article is designed to provide accessible supporting material for teaching social constructivism to introductory international relations classes.
Journal Article
Ozone Depletion and Climate Change
Matthew J. Hoffmann explores the fundamental question of who should participate in the global response to ozone depletion and climate change. Blending social constructivist theory with insights from the study of complex adaptive systems, Hoffmann develops a unique framework for understanding the emergence and evolution of participation norms, which define the appropriate global response and shape how states have perceived the problems, defined their interests and strategies, and pursued governance. The explanation is rigorously developed through an innovative combination of formal analysis and in-depth empirical case studies. Agent-based computer simulation modeling is employed to explore essential norm dynamics, analysis that is complemented and extended by process-tracing case studies that examine governance activities from 1986 through 2003. The result provides the understanding necessary for improving global responses to environmental problems.
eBook