GAMS Graphical User Interface Generator (GGIG)
Complex economic models offer a wide range of options for simulation runs and return a vast amount of data, which has to be explored and exploited in various ways. The GAMS Graphical Interface Generator (GGIG) allows to operate such economic models through a Java based user interface.
GGIG was developed to generalize functionalities originally developed for CAPRI and allows to steer complex applications and to analyze their results based on tables, graphics and maps. It generates a basic Graphical User Interface for GAMS projects based on XML files.
These files define the controls for simulation runs and result exploitation. GGIG is currently used in a number of economic and agricultural modeling projects across the world. Besides GAMS, it also supports applications using the free-ware statistical package R and can also provide input for applications realized in Java. One project might also combine applications using these different languages.
GGIG can be used on Windows and on MAC/Linux.
Where is GGIG used?
GGIG is currently used, for instance, in the following projects respectively modeling systems
- CAPRI, where it replaces the former proprietary solution
- CGEBOX, a modular GTAP based CGE, developed together with the GTAP center in Purdue
- The PEM Model of the OECD, release to the user community in February 2016
- The METRO Model of the OECD, a global, trade oriented CGE model
- The IFM-CAP at JRC-IPTS, An EU-Wide Individual Farm Model for Common Agricultural Policy Analysis
- The regional CGEs developed in the CAPRI-RD project
- FARMDYN, a highly detailed, fully dynamic Mixed Integer Single Farm model for dairy farm
- ABMSIM, an Agent Based Model for structural change in agriculture, where itdrives a Java application
- A tool to exploit data from FADN and run different FADN based simulation models, developed in the FADNTOOL project
- The LANA-HEBAMO river basing model for the Lake Naivasha basin in Kenya, developed in the context of the project RCR - Resilience, Collapse and Reorganisation in Social-Ecological Systems of East- and South Africa's Savannahs.
- BW-GLOBAL-FOR, a Multi-Commodity model for wood and wood based products
- AGRISPACE, a recursive-dynamic agricultural sector model for Norway
GGIG user guide, 174 pages, Version March 2021
GGIG programming guide, 84 pages, Version March 2021
Britz, B., Perez, I. and Gopalakrishnan B.N. (2015): Analyzing Results from Agricultural Large-scale Economic Simulation Models: Recent Progress and the Way Ahead, German Journal of Agricultural Economics 65(2): 106-119
Britz, W. (2014): A New Graphical User Interface Generator for Economic Models and its Comparison to Existing Approaches, German Journal of Agricultural Economics, 63(4): 271-285
|February 2021||Automated test in batch facility, improved HTML output|
|January 2018||Support for MAC|
|September 2017||Better handling of many controls on one tab|
|May 2017||New style options for controls|
|June 2016||Support for different projects in one installation|
|November 2015||Network graphs added|
|October 2015||Beta testing for GTAP in GAMS with GUI based on GGIG to prepare roll-out by GTAP center|
|October 2015||Generic decomposition approach using Jacobian information from CONVERT added to "Equation and Variable viewer"|
|September 2015||OECD decides to used GGIG for official PEM release|
|September 2015||Macros, loops and if conditions in batch mode|
|August 2015||Batch mode supports parallel excecution of several GAMS tasks|
|June 2015||Table and list controls now can load information from GDX files|
|May 2015||Search fields for table columns and rows|
|May 2015||Combo boxes can now also be shown as group in own viewport with scrollbars|
|December 2014||Export to xlsx besides xls added|
|February 2015||Waterfall chart added|
|January 2015||Scatter plots added|
|Spring 2015||Policy Evaluation Model (PEM) goes GGIG, used in introductionary class on Agricultural Policy|
|December 2014||Support for dependencies between controls|
|December 2014||Support for different Look and Feel implementations|
|November 2014||Map viewer supports flexible regional aggregation|
|October 2014||New file selection control with separate box for sub-directories|
|October 2014||Support for SVN version 1.8|
Last updated: Thursday, March 25, 2021
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