TNG Program Version 105c (October 20, 1999):
tng105c.zip (139K).
- The fitness measure for each agent type has been changed from average
payoff per payoff made to average payoff per trade cycle, that is, to total
payoffs (profits) normalized by dividing through by the fixed number of trade
cycles. Counts are also now kept and outputted for inactivity ("wallflower")
and refusal payoffs, and the output formatting has been revised for increased
clarity.
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TNG Program Version 105b (July 29, 1998):
tng105b.zip (139K).
- The range of the elite value has been extended (through a weakening of
ASSERT statements in tngSim.cpp) to allow anywhere from 0 to 100 percent
(inclusive) of the traders of each trader type (pure buyer, pure seller,
buyer-seller) to be treated as elite agents in the application of genetic
algorithm operations.
- The fix-up for the bug in the print-out of average fitness scores that
was incorporated into the previous program version tng105a.zip has been
improved so that all fix-up code changes are now encapsulated in the revised
version of tngSimulation::Dump(void).
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TNG Program Version 105a (July 22, 1998):
- Bug fixed in tngSimulation::Dump(void) that caused the print-out of the
average fitness score for each trader type to have a small systematic upward
bias. This print-out bug did not affect any other aspect of the program
outputs.
-
TNG Program Version 104c (April 7, 1998):
- Additional call to the TNG qsort routine (qsort.c) added to
tngTradeBot::Dump(void) in tngBot.cpp to improve output appearance.
Although conceptually insignificant, this modification changes
the number of calls to the TNG pseudo-random number generator
because the TNG qsort routine randomly shuffles items of equal value
prior to sorting.
-
TNG Program Version 104b (November 30, 1997):
- Qsort routine (qsort.c) modified so that items equal in value are
randomly shuffled prior to sorting to avoid incumbency effects.
-
TNG Program Version 104 (November 18, 1997):
- Clarification of copyright information and terms of release.
- Modified configuration file tng.ini for user inputs and modified
defaults for print out.
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TNG Program Version 103 (September 22, 1997):
- Two bugs fixed with regard to tradeHistory
indexing and FSM state updating that permitted unintended leakage
of information across trade histories.
- Incorporation of separate evolution of distinct trader types: (1) pure
buyers; (2) buyer-sellers; and (3) pure sellers.
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TNG Program Version 102 (February 22, 1997):
- Modifications made to rand(), qsort(), and comparison operator in
TNG program version 101 in order to ensure portability across 32-bit
hardware.
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TNG Program Version 101 (February 13, 1997):
- Executable files tng.exe and tngshell.exe compiled on a
Windows 95 machine. Compatible with Windows 3.11 and NT.
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TNG Program Version 100 (February 6, 1997):
- Executable files tng.exe and tngshell.exe compiled on a
Windows NT 4.0 machine. Not compatible with Windows 3.11.