Improved Combat Reflexes (Combat Feat)

Prerequisite(s): Dex 15, Int 15, Combat Expertise, Combat Reflexes
Benefit(s): The number of attacks of opportunity that you can make each round is increased by [x].
[x] is equal to your intelligence modifier
Special: While your combat expertise stance is active, you benefit from the following effect:
Whenever an enemy makes an attack against you (and misses that attack), they provoke an attack of opportunity from you.

Q: Does the effect of this feat stack with the effect of the Combat Reflexes feat?

A: Yes. A being that possesses both the Combat Reflexes feat and the Improved Combat Reflexes feat would potentially be able to perform a number of attacks of opportunity each round equal to their dexterity modifier plus their intelligence modifier plus one.