投影片 1 - Aiecon

Introduction to Z-Tree Chung-Ching Tai Tunghai University, Taiwan Outline What is Z-Tree? Designing an Experiment Conducting an Experiment Data Files Support November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009)

National Chengchi University, Taiwan What is Z-Tree? Zurich Toolbox for Ready-made Economic E xperiments Urs Fischbacher Fischbacher, U. (2007), z-Tree: Zurich toolbox for ready-made economic experiments. Experi mental Economics 10(2), pp. 171-178. November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in

Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan How to Get Z-Tree? It is free! 1. Download a license contract. 2. Print two copies and sign them, fill in your postal and email addresses. 3. Send contracts to Sally Gschwend, Institute for Empirical Research in Economics, University of Zurich, Bluemlisalpstrasse 10, CH-8006 Zurich.

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan How to Get Z-Tree? 4. Youll receive one copy of contracts and an email of login name and password for downloading z-Tree. Sign the license on behalf of your institute or fac ulty so that people in your institute (ex: your ass istants or students) can also run z-tree.

Refer to Fischbacher (2007) in your paper (if th ere is any) November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Requirements Skills Programming experience is not necessary, but helpful Hardware

Very low requirements OS Windows NT, 2000, XP, (95, 98, ME) Unix Wine Macintosh Virtual-PC November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan A Client-Server Architecture

zleaf.exe (Client: Subject) ztree.exe (Server) November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan New Features Displaying pictures and multimedia files Graphical representation of data (interactive!)

Game trees Pie charts Price paths Network links Visualization of market structure Chat Function November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan

New Features Compatible with neuroeconomic experiments Timing of screen changes/user inputs can be preci sely recorded External hardware inputsuch as fMRI scanner si gnals November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan

Designing an Experiment An example: public good game Starting z-Tree Specifying parameters Programs Input and output Group Matching

Save your experimental design as a ztt fil e! November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Public Good Game Subjects are matched into groups. Each subject has 20 dollars. Each subject has to decide how much of his/h

er 20 dollars to contribute to the public accou nt. November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Public Good Game The money in the public account will be multi plied by 1.6 and distributed among all subjects in the group. The profit of each subject is the sum of his/her

retained endowment and the money gained fr om the public account. November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Preparation Making a shortcut for z-tree.exe Specify the language

Right-click the shortcut Choose Properties Add the parameter /language en (English) November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Specify Server IP Specify the IP address in server.eec

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Starting z-tree (via the shortcut) November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009)

National Chengchi University, Taiwan Specifying Parameters Experiment Session Treatment Period Stage November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009)

National Chengchi University, Taiwan The Structure of the Experiments How does z-Tree execute the commands? November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan November 13-14, 2009

The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Background Parameters Double-click Background We will talk about how to group subjects later. November 13-14, 2009

The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Tables global, subject, summary, contracts, session contains variables used in the experiment Ex: some built-in variables Global: Period, NumPeriods Subject: Period, Subject, Group, Profit, TotalProfit, Participate November 13-14, 2009

The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan How to Create Variables you can create your own variables in the progr ams November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009)

National Chengchi University, Taiwan Programs To add programs, 1. Select the last item (the item before the program) 2. Treatment menu New Program November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in

Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Programs Specify the table Declare and assign v alues to variables Do the programming (use semicolon to se parate expressions) November 13-14, 2009

The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Programs Some useful operators +, -, *, / <, <=, ==, !=, >=, > &, | Scope operators You can look up functions in the Reference Manu al.

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Add a new stage: 1. Select Background 2. Treatment menu New Stage November 13-14, 2009

The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Input and Output Active Screen & Waiting Screen Add a new box: 1. Choose Active Screen of the new stage 2. Treatment menu New Box Standard Box November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in

Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Item Item: input item output item Add an item: Select a box Treatment menu New Item November 13-14, 2009

The value will be shown as a multiple of the value specified in the Layout field Check Input if you are going to create an input field The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan An input item

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Group Matching - Programs You can do the group matching by writing your own programs in the subjects table, ex: Group = if(mod(Subject,5)>0, rounddown(Subject/5,1)-1, rounddown(Subject/5,1));

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Group Matching Automatic Or you can let z-Tree do it automatically. November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009)

National Chengchi University, Taiwan Some Useful Options Partner: The first players constitute group 1, the next players gro up 2 and so on. Stranger: Random matching for each period. Absolute Stranger: each subject is never in the same group with others mo re than once

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Group Matching Parameter Table Specify group identities di rectly in the parameter ta ble. Ex: an experiment with 8 subjects, 4 groups, 3 per iods

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Treatment menu Parameter Table November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009)

National Chengchi University, Taiwan Double-clicking the cells brings out the param eter windows November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan

You can copy and paste parameter settings by 1. Specify the group parameters in some cells 2. Select these cells 3. Copy to other cells by dragging the selected cells November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Conducting an Experiment You can use Clients Table to monitor what sub

jects do. Run menu Clients Table November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Welcome Screen z-leaf You can see the subjects if they execute z-leafs and connect to z-Tree successfully.

Clients Table z-Tree Welcome Screen z-leaf November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Start the Treatment Select the ztt window Run menu Start Treatment

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Once the treatment is started, you can observ e subjects progress in the Clients Table. November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in

Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Displaying profit Information November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan

To End the Experiment Make sure every subject has finished their job s. Clients (z-leaf) Alt + F4 Server (z-tree) File menu Quit November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan

Data Files Files created by z-Tree: All tables are saved here! xls file the main data file sbj file questionnaire responses pay file payment file adr file subjects address gsf file gamesafe in binary form November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in

Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan Support Official Website http://www.iew.uzh.ch/ztree/index.php Z-Tree Wiki https://www.uzh.ch/iew/ztree/ssl-dir/wiki/ Mailing list https://lists.uzh.ch/iew.lists.uzh.ch/sympa/info/ ztree (hit subscribe in the left)

November 13-14, 2009 The 6th International Workshop on Agent-based Approaches in Economic and Social Complex Systems (AESCS 2009) National Chengchi University, Taiwan

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