Are you making money overall? If yes, ignore individual commodity prices. Unless the point of your game is to play ecomomics? I very rarely pay any attention to prices of items and mostly let the minister deal with trades. Although I do lock the ai out of everything else.
As long as I can produce and field a military I am happy.
I noticed in your original post, this thread, you typed you had a GDP over 53K and it was rising fast. This is one reason your production costs are so high. The production costs include wages. When your GDP/c rises your people expect better things in life and they want a pay raise to buy those things. Obviously I do not know what your economy looks like other than the few things you have typed here, but try raising the domestic price of Consumer Goods. Balance that price so that your GDP/c starts lowering and your Domestic Approval Rating is hovering at no less than 25%.
What is your Unemplyoyment % at? The higher it is the lower your production costs. More people out of a job means more people competting for available jobs equals less you have to pay in wages. Try to get it to 5%-6% and see what effect that has.
Taxes can play a role in this also, specifically Sales Tax and Low Income Tax. There are so many ways to manipulate the economy no one person could type all of them here and make this a reasonable post.
I do think you are spending an inordinate amount of time worring about these things though
Just build an army and lay waste to your enemies, you would be suprised how much of an impact on GDP/C it has when you absorb a third world country.
EDIT: What county are you playing as?
Hi there GI, again.
My mistake, my ongoing game is with PRC, my GDP/c is around 12500 (increasing by 1 or 2 per day). I do make money, i am earning 4.000 M Daily, with a surplus of 120000 millions per year, my nominal GDP is 17.200.000 M and rising by 2.000 or 3.000 M daily. My unemployment is static at 3.9% of 1.463.600.000 inhabitants. My inflation is 6.2% and i think going down since i pike at 8.6% when building facilities, currently i am not building any, because i do not need to do so. I am self sufficient in all commodities.
Now, regarding my doubts, i clicked the export window of each of the following items, then i payed attention to bulk sales. I raised the price for water, agriculture, con goods, oil and energy. Been water an cons good the most problematic. I had set the price to the minimum as some one suggested me a wile ago, all the way down (to the left) and after i set the price for the above mentioned items water went up very fast, so i let the slider at 3% for those things. Now There was a very little change in production price of oil, meaning that now it costs 83 dollars to produce such item in comparison to the 82 dollars prior to changes. For water i think it went down, cheaper. But Consumer goods keep been a pain in the head, the market prices is rapidly decreasing by 3 dollars each day.
Now you have said that you let the ministers do that job, that means that if you lock the minister using the LOCK button it will control the import-exports anyways, (of course if the slider is automated slider is above 0%)? Because as i said before i went with the strategy of moving all commodities bulk sales sliders way left (i got this answer for the question regarding the market price changes; where i was moving those sliders every two or three days to be competitive in the global market, so someone suggested keeping those down). I did it, for a while, lets say 2-3 years i was a good idea from that point o view (not concerning about the global exchange of goods), but now i am running the year 5 and i find this idea not useful anymore.
Thanks again GI. If you want me to upload an specific picture let me know.