Do these stack per amount of luxury resource you have acces to?

For example, if I have 2 Ionic Crystals. Do I get +10 * 2 happiness ? And 2 gold per person * 2?

And what about strategic resources, do they stack as well?



I apologise if this question has been asked already, but is sometimes difficult to find similar questions.

Another related question. Do the 2 gold per person only apply to the planet the particular resource is located on or does it apply to all the planets in your empire?

I'm pretty sure the effects stack and, yes, they only affect the planet the resource is from. Correct me if I'm wrong, but a side-effect of this is that the non-monopoly bonuses of luxury resources that you traded for are not used.