What is oTree?¶
oTree is a platform/software package to run online/lab experiments.
Participants interact with the experiments and with each other by using their browsers
oTree runs on/as web server
It may run on your computer for development (local installation)
It runs on a physical server (Server setup)
It runs on cloud services (Heroku, oTree hub, AWS, DigitalOcean etc.)
It has two modes:
Manual programming (Dominantly Python)
Point-and-click interface (oTree Studio)
In this book we teach and refer to the the first mode.
Point-and-click interface is available here: oTree Studio (Free for small/medium sized projects, paid subsription of the rest)
oTree and z-Tree comparision¶
This comparision is for those who already use z-Tree . If you don’t know what z-Tree is or you have never used it, please feel free to skip.
z-Tree is click & run,
oTree needs a server¶
If you use z-Tree, you know that, for a basic setup, all you need to do is to run
ztree.exe on your server machine and
zleaf.exe on your clients with few clicks and that’s it. oTree is a little complicated than that. It should be running on a server.
z-Tree needs client software,
z-Tree, clients require a software to run on their computer. With
oTreethey connect to the experiment with a web browser (Firefox, Chromium, Google Chrome etc.).
Urs Fischbacher. Z-tree: zurich toolbox for ready-made economic experiments. Experimental economics, 10(2):171–178, 2007.