z-Tree (Zurich Toolbox for Readymade Economic Experiments) is a software package developed by Urs Fischbacher at University of Zurich's Institute for Empirical Research in Economics to conduct economic experiments such as auctions, ultimatum games, prisoners' dilemma games, trust games, etc. z-Tree has two components. The first is the z-Tree program itself, which controls the experiment, while the second is a client program called z-Leaf, which connects to the computer running z-Tree.

Kellogg has obtained a license for z-Tree. This license allows Kellogg researchers to conduct experiments within Kellogg's facilities only.

Vendor Information

Institute for Empirical Research in Economics
University of Zurich
Bluemlisalpstrasse 10
CH-8006 Zurich


Running z-Tree
Kellogg users may download z-Tree from our website.

Examples and Solutions
Refer to the z-Tree Examples page for sample treatments, tips, and tricks.

Manuals Available at Research Support

Useful Links

  • ztree2stata, a Stata ado file that imports a z-Tree data file and converts it into Stata format.