Population emigates?

[KAS]

I am still fairly new to this game and trying to figure out the mechanics. Over the past couple of days, I have, on and off, received messages in my inbox about a certain number of my citizens having emigrated. Why is this happening?

[Krum]

Because of the happiness. If you keep your happiness high you will most likely get more people. If on the contrary your happiness is low-ish you will most likely lose people.

[Ice1987]

And correct me if I'm wrong , that's depends on the avarage happiness of all the players that in your range of points.(not too strong and not too weak). If your village happiness is above the average - new workers will join your ranks. If not - you will lose workers. The number of the workers the leaves you or joins you depends on how far your happiness from the avarage.

[redborg]

thats a pretty good summary yes