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Axtell, Robert

Works: 23 works in 35 publications in 1 language and 536 library holdings
Roles: Author
Classifications: HF5006, 330
Publication Timeline
Publications about Robert Axtell
Publications by Robert Axtell
Most widely held works by Robert Axtell
Reevaluating the relationship between transferable property rights and command-and-control regulation by Robert William Hahn( Book )
2 editions published in 1992 in English and held by 6 libraries worldwide
Theory of model aggregation for dynamical systems with application to problems of global change by Robert Axtell( Archival Material )
3 editions published in 1992 in English and held by 4 libraries worldwide
Foresight as a survival characteristic : when (if ever) does the long view pay? by Robert U Ayres( Book )
2 editions published in 1993 in English and held by 3 libraries worldwide
Agent-based modeling in intelligence analysis by Aaron B Frank( Book )
2 editions published in 2012 in English and held by 2 libraries worldwide
The United States Intelligence Community (IC) was born out of the experiences and organization of the Office of Strategic Services during World War II and became a permanent fixture of the national security establishment with the passage of the National Security Act of 1947. Since its inception, there has been a strong fascination with the secret aspects of its work, particularly with respect to the clandestine collection of information and covert efforts to influence foreign governments, and to undermine rival intelligence services. By comparison, intelligence analysis, specifically the ways in which intelligence professionals develop and present assessments about the international system to policy makers, has been relatively ignored. As a result, intelligence analysis has remained largely under-theorized within the study of international relations, despite its prominent role in strategic thinking--only receiving significant attention in the aftermath of perceived failures. Understanding intelligence analysis is made more complex as new technologies affect analysts' access to new sources and methods. The challenge of technological change in intelligence studies has often been approached in one of three ways. New technologies may be seen as the source of new threats and opportunities in the international system, thus falling within the general application of security studies or international relations through threat assessments and estimates. A related, secondary study of technological change is more confined to the IC, pertaining to how new technologies might be exploited for collecting information, deceiving adversaries, and processing data. A third consideration of technology within the IC is largely concerned with organizational structure and processes, particularly as they relate to the sharing and securing of information within and between the communities. This study considers a fourth perspective of technological change with in the IC by examining how new technologies affect the tradecraft of analysis itself. In doing so, several perspectives are considered in order to understand how Agent-Based Modeling (ABM) can transform the dominant analytic paradigms that guide how intelligence analysis is currently practiced. While the majority of intelligence studies are empirical in nature, this project develops and advances a normative theory of intelligence analysis that argues for the careful consideration, development, and implementation of a model-centric analytic tradecraft, particularly for the production of strategic intelligence. Rather than focus on prior cases of intelligence failures in order to demonstrate how intelligence analysts, collectors, managers, and policy makers have erred in the past, this project provides theoretical arguments in favor of establishing a new analytic tradecraft and demonstrates, if only in a rudimentary fashion, what this new approach may look like in practice. In this study, several persistent debates within intelligence studies, familiar to a small group of scholars and theoretically minded professionals, are reimagined in light of the challenges and opportunities that new modeling and simulation capabilities provide. At its simplest, most conservative application, ABM extends the ongoing development of Structured Analytic Techniques (SATs), the centerpiece of contemporary analytic tradecraft. At the maximum, ABMs can reframe analytic practice, synthesizing the longstanding and opposing views as to whether intelligence analysis is an art or a science, and in the process transform the most challenging and interesting aspect of the intelligence profession--the relationship between intelligence producers and consumers
Economics, thermodynamics and process analysis by Robert U Ayres( Book )
2 editions published in 1994 in English and held by 2 libraries worldwide
Innovation from a computational social science perspective : analyses and models by Randy M Casstevens( Book )
2 editions published in 2013 in English and held by 2 libraries worldwide
Innovation processes are critical for preserving and improving our standard of living. While innovation has been studied by many disciplines, the focus has been on qualitative measures that are specific to a single technological domain. I adopt a quantitative approach to investigate underlying regularities that generalize across multiple domains. I use a novel approach to better understand the innovation process by combining computational models with empirical data on software development, on one hand, and the evolution of the English lexicon on the other. Innovation can be viewed as the recombination and mutation of existing building blocks. I focus on how building blocks are used to generate innovations. The building blocks are pieces of code (e.g., functions or objects) for the software development data and words for the written language. These data lie at extremes of time scales: innovation occurring over the course of a few days or a week in the case of software while language evolution occurs over decades or centuries. This allows the examination of innovation processes that range from highly-constrained to completely open-ended. Computational methods reinforce the findings from the data analyses and permit exploration of the general features of innovation processes through the construction of abstract models
Zipf distribution of U.S. firm sizes by Robert Axtell( Article )
1 edition published in 2001 in English and held by 1 library worldwide
Effects of interaction topology and activation regime in several multi-agent systems by Robert Axtell( Book )
1 edition published in 2000 in English and held by 1 library worldwide
The Center on Social and Economic Dynamics at the Brookings Institution, located in Washington, D.C., offers the full text of the July 2000 paper entitled "Effects of Interaction Topology and Activation Regime in Several Multi-agent Systems," written by Robert L. Axtell. The text is available in PDF format. Axtell compares the effects of agent interaction and activation structures in different multi-agent models of social phenomena
Dynamics of firms from the bottom up : data, theories, and models by Robert Axtell( visu )
1 edition published in 2017 in English and held by 1 library worldwide
This seminar will examine important features of the cross-sectional distribution of private business firms based on micro big data (collected primarily from tax records) and introduce new computational models to explain such data. The data allow characterizing the overall structure of the American private sector in terms of the number and types of firms, firm sizes (using both input and output measures), productivities, ages (including survival rates and lifetimes), entry and exit, growth rates (as functions of size and age), employee tenure and turnover, wages and taxes paid, and inter-firm networks of various kinds. International comparisons will be offered for certain micro data available in other countries. While a variety of firm-growth models (e.g., Simon and Bonini, 1958; Gabaix, 1999; Luttmer, 2010) fail to capture the complexity of data universes, large-scale computational microeconomic models can mostly do so. Professor Axtell will describe results from models involving 120 million employees who organize into 6 million firms. These models with labor market dynamics involve coalition (firm) formation and feature perpetual dynamics at the agent level, while quasi-stationary distributions arise at the aggregate level. The seminar will also discuss software and hardware required to implement such large-scale models and “estimation by simulation” techniques in which economists may be interested for their applied work
The emergence of firms in a population of agents : local increasing returns, unstable Nash equilibria, and power law size distributions by Robert Axtell( Book )
3 editions published in 1999 in English and held by 1 library worldwide
Coordination in transient social networks: an agent-based computational model of the timing of retirement by Robert Axtell( Article )
1 edition published in 1999 in English and held by 1 library worldwide
Why agents? : on the varied motivations for agent computing in the social sciences by Robert Axtell( Book )
1 edition published in 2000 in English and held by 1 library worldwide
Volatility and asymmetry of small firm growth rates over increasing time frames by Rich Perline( Book )
2 editions published in 2006 in English and held by 1 library worldwide
Changing how we discount to make public policy more responsive to citizen's time preferences [electronic resource] by Robert Axtell( Book )
1 edition published in 2006 in English and held by 1 library worldwide
Coupled dynamics of labor and firms through complex networks by Omar A Guerrero( Book )
1 edition published in 2013 in English and held by 1 library worldwide
This dissertation bridges the gap between labor and firm dynamics through the study of complex networks in labor markets. With extensive use of large-scale employer-employee matched micro-data and agent-based modeling, we tap into the effects that networked structures (between individuals or between firms) exert in labor outcomes and employment dynamics. Some of the contributions of this work are: (i) the first characterization of a network of firms for an entire economy (connected through labor flows, i.e. labor flow networks); (ii) the study of the relationship between labor flow networks and employment dynamics; (iii) agent-based models that generate rich stylized facts about labor, firm, and social dynamics from microeconomic behavior; (iv) providing the microeconomic foundations of the formation process of labor flow networks by coupling job search models with models about the formation of complex networks. We show that the study of labor dynamics can be enriched by coupling firm dynamics. Using agent-based modeling is a natural way to deal with the heterogeneous experiences of workers and firms while maintaining a simple representation of the labor market. Despite their simplicity these models are grounded on empirical evidence obtained from large-scale micro-data and are capable of generating numerous stylized facts simultaneously. This approach has great potential for the design and evaluation of labor policies. Therefore, governments, regulators, and policy-makers would be greatly benefited from collecting large-scale labor micro-data, analyzing labor flow networks, and developing agent-based models of labor markets
The emergence of classes in a multi-agent bargaining model by Robert Axtell( Book )
1 edition published in 2000 in English and held by 1 library worldwide
Firm size dynamics of industries : stochastic growth processes, large fluctuations, and the population of firms as a complex system by Daniel Teitelbaum( Book )
2 editions published in 2005 in English and held by 1 library worldwide
Firm sizes : facts, formulae, fables and fantasies by Robert Axtell( file )
1 edition published in 2006 in English and held by 0 libraries worldwide
Emergent cities : micro-foundations of Zipf's law by Robert Axtell( file )
2 editions published between 2006 and 2008 in English and held by 0 libraries worldwide
Non-cooperative dynamics of multi-agent teams by Robert Axtell( file )
1 edition published in 2002 in English and held by 0 libraries worldwide
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Alternative Names
Axtell, Rob
English (32)
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