Extensive form of multiplayer games I want to model an interaction between a government and its citizens using the game theory extensive form, but I want to express the posibility that the citizens don't act as a unique agent. For example, government imposes a new tax, some of the citizens pay it without problems, but others don't do it because socioeconomical problems. 

Obviously, both situations can happen at the same time so in the extensive form there wouldn't be a unique selected leaf node. ¿Does this mean that I can't use extensive form in this case?

I'm looking for an example in the game theory literature, but I can't find anything.

Thank you
There is no possibility to model a 


  "single" player [that] can simultaneously choose different options.


Neither in the normal nor in the extensive game form. Different types of a player can be only be used if they are mutually exclusive. So suppose the citizens (one player!) can either be poor or rich and this may affect their pay-offs and thus actions. There is no possibility for the citizens to be poor and rich at the same time (while represented by the same player).

Your only option is to follow Sub-Optimal's solution and model different types of citizens as different players.

As Bayesian pointed out, you can then model simultaneous decisions by citizen 1, 2 and so forth by setting their information sets accordingly.