The External Faculty is composed of researchers from a broad range of fields, selected on the basis of research excellence, interactivity, interest in interdisciplinary research, commitment to SFI programs, and willingness to lead SFI research programs.

David Ackley, External Professor, SFI • Professor, University of New Mexico, Computer Science
Artificial life models and real artificial life • Robust computation and architectures • Software evolvability

W. Brian Arthur, External Professor, SFI • Palo Alto Research Center (PARC), Intelligent Systems Lab
Economics

Robert Axtell, External Professor, SFI • Professor, George Mason University, Krasnow Institute for Advanced Study, Krasnow Institute for Advanced Study
Social Complexity

Nihat Ay, External Professor, SFI • Max Planck Institute for Mathematics in the Sciences
Mathematics

Sander (F.A.) Bais, External Professor, SFI • Professor, University of Amsterdam, Institute for Theoretical Physics
Topological order • Exactly soluble models in higher dimensions • Topological quantum computing • Quantum symmetries and dualities

Carl Bergstrom, External Professor, SFI • Associate Professor, University of Washington, Dept. of Biology
Information flow in biological systems • Ecology and evolution of infectious disease • Economics of scientific publishing • Risk and evolution • Evolution of immune systems

Luis Bettencourt, External Professor, SFI • Permanent Technical Staff Member [Research Scientist], Los Alamos National Laboratory, Theoretical Division
Fundamental Aspects of Nonlinear Dynamics, Statistical Physics, Complex Systems • Memory and Information Processing in living Neuronal Networks • Real Time Epidemiology, Emerging Infectious Diseases and Pathogen Evolution • Urban Organization and Dynamics, Population and Economic Growth, Sustainability • The Social Dynamics of Innovation and Scientific Discovery • Distributed Sensor Networks and Aridland Ecology

Lawrence Blume, External Professor, SFI • Professor, Economics and Information Science, Cornell University, Economics

Robert Boyd, External Professor, SFI • Professor, University of California-Los Angeles, Department of Anthropology
Anthropology

Elizabeth Bradley, External Professor, SFI • Professor, University of Colorado, Department of Computer Science
Nonlinear dynamics • Modeling and control of nonlinear systems • Artificial Intelligence

Jim Brown, External Professor, Science Steering Committee, SFI • Distinguished Professor, University of New Mexico, Biology

Timothy G. Buchman, Ph.D., M.D., FACS, FCCM, External Professor, SFI • Professor, Washington University School of Medicine in St. Louis, Department of Surgery / General Surgery - Acute and Critical Care Surgery
Emergency Surgery • Burn/Trauma/Surgical Critical Care

Carlos Castillo-Chavez, External Professor, SFI • Professor, Arizona State University, Mathematics and Statistics
Biomathematics

James P. Crutchfield, External Professor, SFI • Professor of Physics, University of California, Davis, Complexity Sciences Center and Physics Department
Nonlinear dynamics, chaos, and pattern formation • Nonlinear physics: Solid-state physics, astrophysics, fluid mechanics, critical phenomena and phase transitions • Computational mechanics • Physics of complexity • Statistical inference for nonlinear processes • Genetic algorithms • Evolutionary theory • Machine learning • Quantum dynamics • Distributed intelligence

Lisa Curran, External Professor, SFI • Professor, Yale University, Yale School of Forestry and Environmental Studies
Topics: Ecology, Ecosystems and Biodiversity, Global Change Science and Policy, Social Ecology of Conservation and Development • • Expertise: Biodiversity and Habitat; Carbon Sequestration; Climate Change (Global Warming); Deforestation (Logging); Forestry; Land Use; National Parks; Parks and Protected Areas; Public Lands; Sustainable Forestry; Tropical Forest Ecosystems

Raissa D'Souza, External Professor, SFI • Professor, University of California, Davis, Department of Mechanical and Aeronautical Engineering
Phase transitions, self-organization, and the structure, function and growth of networks.

Vincent Danos, External Faculty, SFI • Directeur de Recherches CNRS

Rob de Boer, External Professor, SFI • Utrecht University, Theoretical Biology
Theoretical Biology

Andrew Dobson, External Professor, SFI • Professor, Princeton University, Ecology & Evolutionary Biology

Santiago Elena, External Professor, SFI • CSIC Research Professor, Instituto de Biología Molecular y Celular de Plantas, Evolutionary Virology Group
Evolutionary biology of microbes

Brian Enquist, External Professor, SFI • Associate Professor, University of Arizona, Department of Ecology and Evolutionary Biology
Scaling in biology • Evolution of form, function, and diversity • Macroecology and Global Ecology • Ecoinformatics

Joshua M. Epstein, External Professor, SFI • Director, Center on Social & Economic Dynamics; Senior Fellow, Economic Studies, The Brookings Institution
Modeling of complex social, economic, and biological systems using agent-based computational models and nonlinear dynamical systems, with applications to economics, public health, and international security.

Nina Fedoroff, External Professor, Science Steering Committee, SFI • Science and Technology Advisor to the Secretary of State, U. S. Department of State
Plants • Genetics • Molecular Biology

Marcus W. Feldman, External Professor, Science Steering Committee, SFI • Professor, Stanford University, Biological Sciences

Duncan Foley, External Professor, SFI • Graduate Faculty, New School for Social Research, Economics

Walter Fontana, External Professor, Science Board, SFI • Professor, Harvard Medical School
Signaling • Evolvability • Aging

Stephanie Forrest, External Professor, Science Board, SFI • Professor and Dept. Chair, University of New Mexico, Computer Science
Immune System Modeling • Computer Immune Systems • Cancer as an Evolutionary System • Negative Representations of Information

John Geanakoplos, External Professor, Science Board, Science Steering Committee, SFI • James Tobin Professor of Economics, Yale University, Economics

Herbert Gintis, External Professor, SFI • Professor, Central European University, Economics
Dynamics of General Equilibrium • Unification of the Behavioral Sciences • Modeling Cooperation in Humans • Evolutionary Game Theory • Behavioral Economics

Jessica Green, External Professor, SFI • Professor, University of California-Merced, Department of Natural Sciences
Theoretical Ecology

George Gumerman, External Professor, SFI • School for Advanced Research, Archeology and Anthropology

Peter Hammerstein, External Professor, SFI • Humboldt-Universitaet zu Berlin
Theoretical Biology

Bailin Hao, External Professor, SFI • Fudan University
Theoretical physics, computational physics, nonlinear science, theoretical life science

James Hartle, External Professor, SFI • Research Professor and Professor of Physics Emeritus, University of California, Santa Barbara
Quantum Cosmology and Quantum Mechanics

John H. Holland, Trustee, Science Board, External Professor, SFI • Professor, University of Michigan, Ann Arbor, Computer Science/Engineering/Psychology

Alfred Hübler, External Professor, SFI • Director, Center for Complex Systems Research and Professor, Physics, University of Illinois-Urbana
Nonlinear and complex dynamics, control of chaos, pattern formations, teaching complex systems

Ray Jackendoff, External Professor, SFI • Seth Merrin Professor of Philosophy, Co-Director, Center for Cognitive Studies, Tufts University, Department of Philosophy
Natural language semantics/conceptual structure, Syntax and the syntax- semantics interface, The lexicon, Architecture of the language faculty and other cognitive capacities, Music cognition, Social cognition, Consciousness

Matthew Jackson, External Professor, SFI • Professor, Stanford University, Economics
Social and Economic Networks • Game Theory • Voting and Social Choice Theory • War and Conflict

Sanjay Jain, External Professor, SFI • Professor, University of Delhi, Department of Physics and Asrophysics
Structure and dynamics of complex networks, including chemical, biological, and socio-economic networks • Mathematical modeling of complex adaptive systems, evolutionary mechanisms • Models of non-equilibrium statistical mechanics • Nonlinear dynamics, random matrix models and quantum chaos • Quantum field theory, superstring theory and quantum gravity

Erica Jen, External Faculty, SFI

Jüergen Jost, External Professor, SFI • Director, Max Planck Institute for Mathematics in the Sciences
Complex Systems and Cognitive Structures

Kunihiko Kaneko, External Professor, SFI • Professor, University of Tokyo, Department of Pure and Applied Sciences
Physics • Theoretical Biology

Hillard Kaplan, External Professor, SFI • Professor, University of New Mexico, Anthropology
Evolutionary ecology, subsistence behavior, sex roles, and hunters and gatherers in South America and Africa.

Stuart Kauffman, External Faculty, SFI • Director, University of Calgary, Institute for Biocomplexity & Informatics

Tim Kohler, External Professor, SFI • Regents Professor, Washington State University, Anthropology
Social & ecological processes in Neolithic societies • Agent-based modeling • Robustness & resilience in human societies • Cultural transmission & human behavioral ecology

Bette Korber, Visiting Researcher, External Faculty, Science Steering Committee, SFI • Theoretical Division, Los Alamos National Laboratory
Immunology • Theoretical Biology • Biophysics

Supriya Krishnamurthy, External Professor, SFI • Swedish Institute of Computer Science, Physics

David Lane, External Professor, Science Board, SFI • Professor, Università degli Studi di Modena e Reggio Emilia, Economics
Innovation in agent-artifact space

Fabrizio Lillo, External Professor, SFI • Assistant Professor, University of Palermo, Economics/Biology
Stochastis Processes, Econophysics, Biological Information

Seth Lloyd, External Professor, SFI • Professor, Massachusetts Institute of Technology, Dept. of Mechanical Engineering

Jonathan Machta, External Professor, SFI • Professor, University of Massachusetts Amherst, Department of Physics

Stephan Mertens, External Professor, SFI • Otto-von-Guericke Universität Magdeburg, Theoretische Physik
Statistical Mechanics • Computational Complexity • Parallel Computing

Lauren Ancel Meyers, External Professor, SFI • Associate Professor, University of Texas at Austin, Section of Integrative Biology
Evolutionary Biology • Infectious Disease Epidemiology

Melanie Mitchell, External Professor, Science Board, SFI • Professor, Portland State University, Computer Science
Intelligent systems, cognitive science, machine learning, evolutionary computation, and artificial life. • Understanding how natural systems perform computation, and how to use ideas from natural systems to develop new kinds of computational systems.

Martina Morris, External Professor, SFI • Professor of Sociology and Statistics, University of Washington
Analysis of Social Structure • Population Dynamics

Michel Morvan, External Professor, SFI • IXXI-Complex Systems Institute-LIP-Ecole Normale Supérieure de Lyon, Computer Science
Complex systems modelling methods • Robustness of complex systems • Modelling morphogenesis of plants and animals

Avidan Neumann, External Professor, SFI • Associate Professor, Bar-Ilan University, Goodman Faculty of Life Sciences
Viral Dynamics and Evolution and Host-virus intreractions • Immune Dynamics and auto-immune disease • Mathematical Biology

Mark Newman, External Professor, Science Board, SFI • Professor of Physics and Complex Systems, University of Michigan, Physics and Complex Systems

Kazuo Nishimura, External Professor, SFI • Director, Kyoto University, Institute of Economic Research
Economic Theory

Norman Packard, External Professor, SFI • CEO, ProtoLife s.r.l.
Physics

Maya Paczuski, External Professor, SFI • Professor of Physics and Head of Complexity Science Group, University of Calgary
Distributed Information Networks • Structure of Complex Networks • Complex Dynamical Systems • Sociophysics

John Padgett, External Professor, SFI • Professor, University of Chicago, Political Science

Scott Page, External Professor, SFI • Research Professor Center for Political Studies; Associate Director, Center for, University of Michigan, Ann Arbor
Formal Modeling • Research Methods

Mark Pagel, External Professor, SFI • Professor, Reading University, School of Biological Sciences
Evolutionary Theory • Language and Cultural Evolution • Emergence • Robustness EV • Evolvability

Mercedes Pascual, External Professor, SFI • Associate Professor, University of Michigan, Department of Ecology and Evolutionary Biology; Center for the Study of Complex
Theoretical Ecology • Disease Ecology

John Pepper, External Professor, SFI • Assistant Professor, University of Arizona, Ecology and Evolutionary Biology
Evolutionary theory and its applications • Multilevel selection • Evolution of cooperation and conflict

Alan Perelson, External Professor, Science Board, SFI • Senior Fellow, Los Alamos National Laboratory
Mathematical and Theoretical Biology • Biophysics

Walter (Woody) Powell, External Professor, SFI • Professor, Stanford University, School of Education
Networks • Institutions • University-Industry Interfaces • Economic Sociology • Comparing Institutional Forms

Steen Rasmussen, External Professor, SFI • Team Leader, Self-Organizing Systems (SOS), EES-6, MS-D462, Los Alamos National Laboratory, Earth and Environmental Sciences
Self-Organizing Systems: • Protocells and self-replicating materials • Energy systems, planetary management, and social impact • Collective intelligence and decision support

Sidney Redner, External Professor, SFI • Professor, Boston University, Physics
Stochastic and first-passage processes • Dynamics of social systems • Structure of complex networks • Disordered systems and percolation theory

Dan Rockmore, External Professor, SFI • Professor, Dartmouth College, Computer Science
Representation Theory, Fast Transforms, Group Theoretic Transforms,Dynamical Systems, Signal Processing and Data Analysis and other Cool(?) Things

Daniel Schrag, External Professor, Science Board, SFI • Professor, Earth and Planetary Sciences; Director, Center for the Environment, Harvard University, Laboratory for Geochemical Oceanography
Isotope Geochemistry • Paleoclimatology • Geochemical Oceanography

Peter Schuster, External Professor, SFI • University of Vienna
Theoretical Chemistry

Rajiv Sethi, External Professor, SFI • Professor, Barnard College, Columbia University, Dept. of Economics
Economics • Group Inequality

Cosma Shalizi, External Professor, SFI • Assistant Professor, Carnegie Mellon University, Statistics Department
Quantitative measures of complexity and self-organization • Nonlinear prediction theory • Statistical inference and machine learning for stochastic processes • Hidden Markov models and stochastic automata • Cellular automata and random fields on networks • Structure and information flow in complex networks • Statistics of heavy-tailed distributions • Neural coding and computation • Political networks • Foundations of statistics and statistical mechanics

David Sherrington, External Professor, SFI • University of Oxford, Condensed Matter Theory Group; The Rudolf Peierls Centre for Theoretical Physics
Theoretical Condensed Matter Physics

Martin Shubik, External Professor, SFI • Seymour Knox Professor of Mathematical Institutional Economics, Yale University, Economics

Ricard Solé, External Professor, SFI • Universitat Pompeu Fabra
Systems, Synthetic and Network Biology

Peter Stadler, External Professor, SFI • University of Leipzig, Dept. of Computer Science & Interdisciplinary Center of Bioinformatics
Bioinformatics, • Computational Biology, • Evolutionary Biology, • Evolution & Development, • Theoretical Chemistry, • RNA, • Origin of Life, • Combinatorial Optimization, • Robustness

Charles Stevens, External Professor, Science Board, Science Steering Committee, SFI • The Salk Institute, Molecular Neurobiology Laboratory
Neurobiology

Steven Strogatz, External Professor, SFI • Professor of Theoretical and Applied Mechanics, Cornell University, Theoretical and Applied Mathematics
Applied Mathematics

Alan Swedlund, External Professor, SFI • Professor Emeritus, University of Massachusetts-Amherst, Anthropology
Population and health in prehistoric, historical, and contemporary settings.

Stefan Thurner, External Professor, SFI • Head of Complex Systems Research Group, Medical University of Vienna

Joseph Traub, External Professor, SFI • Edwin Howard Armstrong Professor of Computer Science, Columbia University, Computer Science

Constantino Tsallis, External Professor, SFI • Brazilian Center for Physics Research

Sander van der Leeuw, External Professor, SFI • Professor of Archaeology, Director, Arizona State University, School of Human Evolution and Social Change
Longer-term evolution of socio-environmental systems • Innovation in urban contexts • Evolution of human cognition over the last 3 M years • Robustness, resilience and vulnerability of socio-environmental systems

Andreas Wagner, External Professor, SFI • Professor, University of Zurich, Dept. of Biochemistry
Evolution of Genetic and Metabolic Networks • Robustness and Evolutionary Innovation • Mobile DNA and its Evolution • Gene and Genome Evolution • Population Genetics

Duncan Watts, External Professor, SFI • Professor, Columbia University, Sociology

Colleen Webb, External Professor, SFI • Assistant Professor, Colorado State University, Biology
Theoretical evolutionary ecology, species interactions, resilience, coevolution, quantitative genetics, genomics, nonlinear dynamics, spatial models

Ken Weiss, External Professor, SFI • Evan Pugh Professor of Anthropology and Genetics, Penn State University
Human genetics • Evolutionary biology

Douglas R. White, External Professor, SFI • Professor, Anthropology, University of California-Irvine, Institute of Mathematical Behavioral Science
Computational social science • Mathematical anthropology • Social networks • Longitudinal analysis • Development and social change • Social simulation and game theory • Complex Historical Dynamics

William (Woody) Woodruff, External Professor, SFI • Los Alamos National Laboratory
Dynamics of inorganic and biological systems • Biological and photochemical energy transduction • Raman and infrared hyperspectral imaging in biology • Cellular and molecular basis of biological scaling relationships • Advanced laser techniques; vibrational and time-resolved spectroscopies

Henry T. Wright, External Professor, Science Board, Science Steering Committee, SFI • Professor of Anthropology and Curator of Near Eastern Archaeology, University of Michigan, Department of Anthropology and Museum of Anthropology
Modeling Cultural Adaptation and Evolution • The Emergence of Chiefdoms and States • Pleistocene Cultural Adaptations

Peyton Young, External Professor, SFI • Professor, Johns Hopkins University, Department of Economics