How many corporations should you have based on population

I am throwing this out there to see what responses and advice not just for myself but for others as well.
How many corporations should your country have? Say I have a country with a population of 25,000,000. Should I have 20, 25 or 30 corps? How many is too many and the opposite not enough. How does one prevent a shortage o workers.
Also if you add population (say I add through a Booster - 1,000,000 population to the example above so the population now goes up to 26,000,000) what are the positive and negative effects of this.

Employment in corps vary so you should have enough corporations to get the country's employment to 96%, with each corporation at 100% employment.

When you use a booster I believe you get non-working spouses, retired people and some injured folks as well, not just labor ready workers.

Better to take a slave and exchange 200k to 400k workers per game month (whatever it will let you) to the country you want to build up. Sell all weapons in the slave and close corps as you run out of workers to transfer. Transfer the cash to your main, rinse and repeat.

Employment in corps vary so you should have enough corporations to get the country's employment to 96%, with each corporation at 100% employment.

When you use a booster I believe you get non-working spouses, retired people and some injured folks as well, not just labor ready workers.

Better to take a slave and exchange 200k to 400k workers per game month (whatever it will let you) to the country you want to build up. Sell all weapons in the slave and close corps as you run out of workers to transfer. Transfer the cash to your main, rinse and repeat.

The general rule of thumb I've seen around is about 1 industrial corporation per million people, or 2 military corporations per million people.

As many as you can fit. Do NOT follow the one corp per Million. Batavia has 106 pop, something around 150 corps.

As many as you can have!

from an old man.. "it all depends on the kind of corp you wanna build" Military supply corps on WG requires low amount of workers but are highly profitable. so with this you can build tons of them while maintaining ur population..

Thanks guys for all the advice.

As Machinery stated, highly depends on corporation type. As well as if your corporations are based in enterprise or state owned in your country, as enterprise corporations can employ less workers through efficiency upgrades. As well as allow you to put housewives and disabled people back to work.

Military corporations employ far less people than your standard industry corporation, and are often more profitable. ( some may be risky, but corporations that make weapons that are needed for supplies in other corporations are often the least risky ie Nuclear Defense Batteries and Stealth Bombers ) However, you will need to keep up a good education index because you will need more engineers and senior engineers.

My countries are fairly balanced, with mostly industry and high tech corporations. I average around 700,000 population per corporation at around 90 employment.

Edit: For the booster. When you boost population through gc t

No one can have too many Shoe Corporations!!!!

Mother,

try to set up a country with Shoes only.

I just set up one with natural resources only. (on KB).

One of my countries has a corp named Alligator Shoes. My sims have the finest shoes made out of leather.