System Dynamics Review volume 37, issue 4


System Dynamics Society | System Dynamics Review
System Dynamics Review
Volume 37, Issue 4
 This issue discusses how En-ROADS is being used in a major bank, the role visuals play to help facilitators and users in participatory System Dynamics sessions, a new causal mapping tool that can be used with clients, and much more!

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Science-based analysis for climate action: how HSBC Bank uses the En-ROADS climate policy simulation
by Florian Kapmeier, Andrew S. Greenspan, Andrew P. Jones, John D. Sterman
More than 2600 HSBC employees across different organizational levels and regions have experienced En-ROADS, improving their understanding of the risks of climate change, particularly transition risks, and catalyzing action at senior levels. In this article, the authors describe the pathway for this successful collaboration.
Fig 1. En-ROADS interface.
Metacognition in action as a possible explanation for stock-flow failure
by Gürsu Aşιk, Zerrin Doğança Küçük
The authors examine the metacognitive activities of participants in solving stock-flow tasks and make inferences on the possible reasons for stock-flow failure which include planning, monitoring, and estimating possible outcomes.
See blog
A Bayesian approach to calibrate system dynamics models using Hamiltonian Monte Carlo
by Jair Andrade, Jim Duggan
The authors introduce HMC, which outperforms random-walk methods, apply it to calibrate an SEIR model, and recommend visualization tools that facilitate the communication of results. The combination of SD software, R, and Stan produces robust results, facilitates reproducibility, and enhances the comprehension of the process undertaken.Fig 2. Bayesian workflow adaptation to calibrate SD models.
Boundary objects in translation: the role of language in participatory system dynamics modeling
by Ellis Ballard, Kelsey Werner, Pratiti Priyadarshini
Fig 1. Examples of visuals.Based on a multisite effort in rural India, the authors discuss how the use of visuals can help introduce models, capture the meaning of variables, and encourage model ownership. Challenges did not only include participants but also the facilitation team comprising NGO staff and field staff.
Introducing M-Tool: A standardised and inclusive mental model mapping tool
by Karlijn L. van den Broek, Sina A. Klein, Joseph Luomba, Helen Fischer

Fig 1. Mapped mental model using M-Tool.With M-Tool, participants create influence diagrams with a fixed set of pictograms representing the system variables, and weighted arrows to display their relations. It has already been used in contexts as diverse as fisher’s experience, plant-based protein transition, and COVID-19 transmission.
Feedback Economics: Economic Modeling with System Dynamics (2001)
by John T. Harvey
Ranging from macro to microeconomics, resources, policy analysis, and variations, this book is a phenomenal approach to economics. Visuals and a myriad of examples tremendously help to understand the concepts. Recommended to both neophytes and experienced SD researchers alike.


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