Willow: Experiments in Python

Willow is a tool for making the kinds of computer user interfaces typically used in experimental economics. Without Willow, you might design such an interface from scratch, or by modifying earlier from-scratch software written for similar experiments. Using Willow, you can do the same thing, but faster and better.

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Getting started

To get started with Willow, use the buttons on the right. If you have questions, you can:

  • Read the manual.
  • If that doesn't work, ask on the forum.
  • If that doesn't work, file a bug in the bug tracker.


Can't do without them. Here are some:

Willow is written by Jaap Weel, a PhD student at GMU, and supported by by Professor Kevin McCabe , director of the Center for the Study of Neuroeconomics at GMU .

Willow is a project of the Center for the Study of Neuroeconomics and the Interdisciplinary Center for Economic Science at the George Mason University Department of Economics .

Willow is hosted on