When is it the right time to bluff in poker and diplomacy? Why do stock markets crash? What does it mean for groups of people to make “democratic” choices? All of these phenomena depend on building models of the way that humans make decisions and using data to predict outcomes. This cluster, with faculty from decision science, mathematics, political economy, and statistics, will teach students how to build and test quantitative models that allow us to understand economic and social phenomena.
The main goal of the MESS cluster is to provide students with modeling skills in artificial intelligence, game theory, and statistics that allow them to understand human behavior. Importantly, this is not simply about teaching the necessary quantitative skills; we also seek to develop the reasoning and research design skills of students.
Cluster Prereqs: MATH 111L (Laboratory Calculus I) or the equivalent. (Normally obtained through AP or IB coursework. May be taken as a co-requisite. Please contact the FOCUS office with questions. Courses in the cluster will also require students to learn a programming language (typically, Python or R).
Hubert Bray, Professor of Mathematics
What is democracy? For example, given a finite number of choices, how does a group of equals choose the option which “best” reflects the will of the group? When there are more than two options, this is an open question in the sense that philosophical notions of “best” are not universally agreed upon. The seminar will also include an introduction to game theory as an essential tool for predicting how intelligent people with agendas behave given carefully defined rules. We will apply game theory, broadly defined, to voting theory, economics, poker, and many other games. Class participation includes discussions, presentations, and experimenting with ideas, including by playing the "Money and Politics" game in class which involves electing a class president, taxation, taking risks, forming alliances, and double crosses in an attempt to simulate the real world with relatively few rules.
Scott de Marchi, Professor of Political Science and Director of the Decision Science
Our goal as social scientists is to build models of the world and provide advice to policymakers. Given that human actors are often strategic and the games they play are complex, building and testing these models is difficult and distinct from common examples of machine learning. A task that is often used to motivate introductions to machine learning is teaching a model to recognize hand-written characters using MNIST data (https://www.tensorflow.org/datasets/catalog/mnist). Our task is harder: we must build models that involve forecasting human behavior ranging from votes in a legislature to changes in stock prices. Given the complexity of these sorts of problems, we will cover both human decision-making and machine learning in this course. The hope is that our machine learning models will be better when they are informed by theoretical models of behavior.
Alexander Volfovsky, Associate Professor of Statistical Science
This course introduces statistics and probability through their historical development, allowing us to explore not only how statistical methods work, but why they were invented. Students will encounter foundational quantitative ideas (such as uncertainty, averages, variation, and the central limit theorem) as they originally emerged from real scientific and social problems. Starting with small, historically authentic datasets that gave rise to these methods, students will develop quantitative reasoning skills and build toward understanding how these ideas scale to modern settings involving large and complex data. This foundation provides essential preparation for interpreting contemporary applications of statistics, including modern data science and artificial intelligence.
Gregory Joseph Herschlag, Associate Research Professor of Mathematics
In this course, students will learn about statistical modeling, with primary emphasis on developing critical thinking skills. Topics vary, but can include statistical genetics, agent-based modeling, Shannon's theory of communication, game theory, and mathematical models for epidemics and redistricting. After completing this course, students will be able to design and analyze basic statistical studies, to understand and criticize statistical methods in journals and the media, and to appreciate the power and utility of statistical thinking. Examples and methods are drawn primarily from the behavioral, natural, and social sciences and public policy.
Jessica Corey, Assistant Professor of the Practice of Thompson Writing Program
This course bridges psychology, rhetoric and composition, sociology, and finance to examine how economic systems function as a form of patriarchal social control — and how people are fighting back. As Tori Dunlap writes, "Having a financial education is a woman's best form of protest." Drawing on theorists including Bourdieu, Fraser, and Kilbourne, alongside accessible texts like Dunlap's Financial Feminist, the course traces how marketing psychology, gendered financial advice, and structural wealth gaps create compounding disadvantages for women — with particular attention to intersections of race and class. Students will develop as writers through assignments including a rhetorical analysis of financial advice media, a researched argument about a structural economic barrier, and a multimodal activist response project that asks students to intervene in a real economic conversation.
Sarah Ishmael, Instructor of Thompson Writing Program
Numbers and statistics often appear objective, but they also shape how societies define truth, reality, and whose experiences count. This course explores how data and quantitative evidence function as rhetorical tools, influencing public knowledge, policy, and social understanding.
Drawing on scholarship in rhetoric, critical data studies, and knowledge production, students will examine how statistics are created, interpreted, and contested. Topics include how categories of measurement emerge, how data constructs audiences and arguments, and how numbers can reinforce—or challenge—ideas about normalcy, identity, and social reality.
Through analysis of datasets, infographics, media, and scholarly debates, students will develop skills in research, rhetorical analysis, and academic writing. Major assignments include a personal analysis of a statistic that has shaped their life, a rhetorical analysis of a viral infographic or dataset, and a literature review tracing debates around an influential statistic.
By the end of the course, students will learn to read and interpret data critically, understanding not only what numbers show but how they shape the stories societies tell about themselves.