NYE, your results are normal. You are seeing exactly the effect of a courthouse for the corruption due to number of cities. It's easier to see if you break down the corruption into its components.
In your test, you have 30% distance corruption without a courthouse, and 15% with a courthouse. (See the corruption formula). The Commercial trait makes no difference to this component of corruption, but it does make a difference to the number-of-cities corruption.
These values are exaclty what you reported. Notice how the number-of-cities corruption is the same for Egypt with a courthouse as it is for Rome without.
In your test, you have 30% distance corruption without a courthouse, and 15% with a courthouse. (See the corruption formula). The Commercial trait makes no difference to this component of corruption, but it does make a difference to the number-of-cities corruption.
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[B]Corruption percentage for NYE's test[/B] Total Distance Cities Rome, no Courthouse 55% 30% 25% Egypt, no Courthouse 62% 30% 32% Egypt, with Courthouse 40% 15% 25% Rome, with Courthouse 36% 15% 21%
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