There are two other AI empires with higher GDP, but I think it would be repetitive to show them.

Corruption is very much murderously horrific in 1.04, which is probably why your income has basically evaporated: At this point, population growth doesn't contribute positive income, it contributes negative income as it increases your corruption faster than the additional population contributes income. Plus, as you push 100% corruption, population becomes increasingly useless.ORIGINAL: jscott991
Actually, maybe something is up or corruption in 1.04 is very serious.
How DOES taxation affect GDP anyway? As far as I can tell, private sector income is calculated by pop*dev, and then you skim a percentage of it for taxes. What effect does taxation have on the GDP, therefore?
I think that GDP is not affected by taxation. I think that GDP is calculated from pop*dev (='value') and something else (maybe something like planet type, size, distance from the capital, etc).
I wonder why, though, the AI would autotax my private sector into oblivion, but wouldn't autotax the private sectors of the AI empires in the same way.
Private Sector Income is the value of your planets. Taxes are taken out in the Expenses section of the Private Sector. And its corruption/inefficiency (and everything that it modifies) which affects your planetary value.
In a way, taxes do affect the GDP. When I loaded up jscott's game, I notice the majority of his planets have taxes up to 50% yet very little GDP growth. By slashing the taxes, GPD is gained by the increased population growth, even at high corruption.
Hmm... I think you are wrong here. From my observations, Private Sector Income is the sum of all your planet GDPs, not the value.
ORIGINAL: jscott991
I wonder why, though, the AI would autotax my private sector into oblivion, but wouldn't autotax the private sectors of the AI empires in the same way.
ORIGINAL: taltamir
ORIGINAL: jscott991
I wonder why, though, the AI would autotax my private sector into oblivion, but wouldn't autotax the private sectors of the AI empires in the same way.
Are you sure it doesn't? I find the AI empires to generally be doing more poorly then me.
And I always play with auto-tax on and it doesn't tax into oblivion... usually. (if there is lots of war weariness+race unhappy I am at war with their race it can fail to lower taxes to compensate... which is a problem.)