Maine Food Strategy’s new report on Local Food

Just out yesterday!

Two versions: high resolution/large file or low resolution/small file

Or, just read the infographic at Maine Food Strategy.

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Agent-Based Modeling on the rise

ABM Publications in the last 20 years.

ABM Publications in the last 20 years. ISI Web of Science data on the number of papers published annually on agent-based modeling.

Agent-based modeling (ABM, or individual based modeling in ecology) is on the rise.  ABM is an important and powerful quantitative scientific method.  ABM differs from other simulation approaches in that an agent-based model allows the scientist to specify the behavior of individual agents and allow their interactions to create an emergent outcome.  Computational scientists then study the way in which particular behaviors lead to various outcomes, in a rigorous fashion, to draw conclusions from their models.  Mature agent-based models incorporate real world data for greater veracity and precision.  Agent based modeling is a useful tool for anyone who studies a complex system, especially those who study a complex system with:

  • autonomous agents
  • heterogeneous agents
  • agents with bounded rationality
  • local interactions
  • explicit space
Citations to ABM papers, last 20 years.

Citations to ABM papers, last 20 years.

For a very nice explanation of the unique properties of agent-based modeling, read Josh Epstein’s 1999 paper in Complexity (I linked to the longer version of that paper, which appears in his book on generative social science).  The point today is that agent-based modeling is on the rise!  Papers published on agent based models are growing rapidly, at somewhere between 35 and 50 additional papers per year.  That’s pretty fast for what was recently considered a niche methodology.  More impressive, is the growth of citations within the field of agent-based modeling.  The number of citations to ABM research is doubling roughly every three years.  That’s fast.

And that’s a nice lead-in for my 2014 graduate course on agent-based modeling.

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Culture, Cooperation and Agriculture – an interesting study

The NPR story.

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On the Travel Emissions of Sustainability Science Research

Three coauthors and I have just had a paper published today.  It is “On the Travel Emissions of Sustainability Science Research,” and it examines the ethical and environmental dimensions of travel conducted for sustainability research.  Below are the whole shebang, the citation, the PDF, the data, and the code.  Enjoy.

Waring, T.M., Teisl, M., Manandhar, E. & Anderson, M., (2014) On the Travel Emissions of Sustainability Science Research. Sustainability, 6(5), 2718-2735 [data, code,]

Travel for the purpose of dissemination constituted the largest fraction of travel for 3 years of a $20 million sustainability research project.

Travel for the purpose of dissemination constituted the largest fraction of travel for 3 years of a $20 million sustainability research project.

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Johanna Barret recieves poster prize at Maine Economics conference

Masters student Johanna Barrett received first prize for a graduate student poster at the Maine Economics conference last week. Johanna studies the economic implications of the local food movement and industry in Maine. Here is a PDF of her poster.

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