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Title page for ETD etd-03272017-164330

Type of Document Dissertation
Author Nay, John Jacob
Author's Email Address john.j.nay@gmail.com
URN etd-03272017-164330
Title A Machine Learning Approach to Modeling Dynamic Decision-Making in Strategic Interactions and Prediction Markets
Degree PhD
Department Interdisciplinary Studies: Integrated Computational Decision Science
Advisory Committee
Advisor Name Title
Jonathan M. Gilligan Committee Chair
George M. Hornberger Committee Member
Mark D. Abkowitz Committee Member
Yevgeniy Vorobeychik Committee Member
  • game theory
  • prediction market
  • cooperation
  • modeling
  • machine learning
  • simulation
  • decision-making
  • genetic algorithm
Date of Defense 2017-01-17
Availability unrestricted
My overarching modeling goal for my dissertation is to maximize generalization – some function of data and knowledge – from one sample, with its observations drawn independently from the distribution D, to another sample drawn from D, while also obtaining interpretable insights from the models. The processes of collecting relevant data and generating features from the raw data impart substantive knowledge into predictive models (and the model representation and optimization algorithms applied to those features contain methodological knowledge). I combine this knowledge with the data to train predictive models to deliver generalizability, and then investigate the implications of those models with simulations systematically exploring parameter spaces. The exploration of parameter space provides insights about the relationships between key variables.

Chapter 2 describes a method to generate descriptive models of strategic decision-making. I use an efficient representation of repeated game strategies with state matrices and a genetic algorithm-based estimation process to learn these models from data. This combination of representation and optimization is effective for modeling decision-making with experimental game data and observational international relations data.

Chapter 3 demonstrates that models can deliver high levels of generalizability with accurate out-of-sample predictions and interpretable scores of variable importance that can guide future behavioral research. I combine behavioral-game-theory-inspired feature design with data to train predictive models to deliver generalizability, and then investigate interactive implications of those models with optimization and sensitivity analyses.

Chapter 4 presents a computational model as a test-bed for designing climate prediction markets. I simulate two alternative climate futures, in which global temperatures are primarily driven either by carbon dioxide or by solar irradiance. These represent, respectively, the scientific consensus and the most plausible hypothesis advanced by prominent skeptics. Then I conduct sensitivity analyses to determine how a variety of factors describing both the market and the physical climate may affect traders’ beliefs about the cause of global climate change. Market participation causes most traders to converge quickly toward believing the “true” climate model.

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