You seem to be asking what corporations to own - and trying to guess future demands and how they will change.
Frankly, the game IS pretty stable. There are large numbers of most types of corporations, and most players have pretty good buffer stocks of product. When something goes into extreme shortage, players do sell from their hoards and do form new corporations in that area. When something goes into extreme overstock, players tend to not sell from their hoards (or even buy), and might even dismantle corporations in that area.
Another game balancing move is in the countries like mine, that have more jobs than people. When a product is in over supply, those are the companies that reduce hiring and production. When a product is in short supply, those companies go to full production.
The effect of wars destroying companies and changing supplies is very very small, at least on Little Upsilon where I am. There just are
Many thanks John. I'm looking into more ways to transfer the profits out of my country (23 bil above beginner income and climbing) - and into my enterprise (1.2 bil profit per month over-all. Start-up and upgrades are killing me).
I was really concerned due to some of the threads concerning prior changes - huge losses over a small time would bury me. Or small losses over a huge time, with my slender margin.
And many thanks for the tip on jobs/producing capacity - makes great business sense.
Now to get into farming seriously so I can assist my sluggish financial situation. (and build up those production stocks).
Marshal Ney
Grand Duchy of Marshall, duc d'Elchingen.
Golden Rainbow