I solve problems using mathematics,


by understanding the wider system,


by analyzing and visualizing data,


and by building computer models,


in order to find solutions.

What I do

I am finishing my PhD at Utrecht University, where I built models of long-term demand for food and water. These models are connected to existing models of the energy system, the water cycle, food production, climate change and biodiversity.


The goal is to investigate possible future scenarios, and inform policy makers how the world is changing and how their current actions may influence the long-term future of our planet.


My contract ends in August, and I will defend my thesis in December.


I am especially intrigued by Predictive Analytics / Machine Learning methods.

What’s Next

  • Broad technical knowledge
  • Systems thinking
  • Data analysis
  • Computer simulation
  • Predictive analytics
  • Finding solutions



Kaggle Kernels: Various data explorations, visualisations, and solutions to particular computing problems. These are scripts/notebooks in R and python, hosted on the Kaggle website. https://www.kaggle.com/kernels?sortBy=date&userId=351835


Graph Genie: A point-and-click user interface to quickly explore a dataset and produce nice graphs for pdf download. Built with R shiny. Not suitable for very large datasets due to memory constraints. www.graphgenie.com


The Agroecologist: Automated news aggregator on the niche topic of agro-ecology. Built with RSS feeds, Yahoo pipes and WordPress. Because Yahoo pipes shut down on 30 September 2015, it hasn’t been updated since – but still looks nice. www.theagroecologist.com

Fun Projects

Academic papers as main author


Bijl, David L., Bogaart, Patrick W., Dekker, Stefan C., Stehfest, Elke, De Vries, Bert J M & Van Vuuren, Detlef P. (2017). A Physically-based Model of Long-Term Food Demand.  Global Environmental Change, Volume 45, July 2017, Pages 47-62, ISSN 0959-3780.


Bijl, David L., Bogaart, Patrick W., Kram, Tom, De Vries, Bert J M & Van Vuuren, Detlef P. (2016). Long-term water demand for electricity, industry and households.  Environmental Science and Policy, 55 (Part 1), (pp. 75-86) (12 p.).


Academic papers as co-author


Kyle, Page, Johnson, Nils, Davies, Evan, Bijl, David L., Mouratiadou, Ioanna, Bevione, Michela, Drouet, Laurent, Fujimori, Shinichiro, Liu, Yaling & Hejazi, Mohamad (2016). Setting the System Boundaries of “Energy for Water” for Integrated Modeling.  Environmental Science and Technology, 50 (17), (pp. 8930-8931). doi: 10.1021/acs.est.6b01066.


Conference papers


Bijl, David L., & Cunningham, Scott W. (2009). A Model of Consensus in the European Commission. Presented at the 20th International Conference on Game Theory in 2009, at the Stony Brook Center for Game Theory.



PhD candidate (current) at Utrecht University

Global Sustainability, Food, Water, Energy, and Integrated Assessment Models.

2013 – current


MSc Engineering and Policy Analysis at Delft University of Technology

Public Policy, Economics, Logistics, Statistics, Cultural Sensitivities, Decision Making.

Average: 7.6 out of 10. Grade for Master’s Thesis: 8

2006 – 2008


BSc Applied Mathematics at Delft University of Technology

Calculus, Matrices, Optimization, Software Engineering etc.

Average: 7.4 out of 10.

2002 – 2005


VWO / Gymnasium at Melanchthon College Rotterdam

Majored in Natural Sciences, Latin and Greek.

Extra electives: Economics, Philosophy of Science.

Average: 8.3 out of 10.

1996 – 2002