Tariffs: How do they effect your pops? I understand how they protect the domestic economy, but I remember reading somewhere that the middle class pops take a beating.
Tariffs apply to world market
Pops and factories buy the stuff they need from internal market/SoI first, then from world market.
If everything they need is provided by internal market/SoI, then tariffs do nothing.
Now, tariffs can make some products way more costly(or cheaper) than they are.
Factories/artisans can have a very hard time making any profit if they have to buy input from world market with high tariffs...On the other side, negative tariffs can help them (but cost money to you).
Worse, if your whole pop have to buy some needed stuff (wheat, cow, fish...) from world market with high tariffs, you could broke all of your people...not good at all in the long run...again negative tariffs can help...at some price.