Massive Immigration ... somehow

[aroddo]

Move over, Clone Army origin! Here come the immigrants!

This is not my own planet but one of my vassal's.

Since my population growth is pretty much stunted due to size, I frequently absorb my subjects, relocate their pops to my colonies and then release that sector again as vassal.
And one of those planets manages to get an Immigration rate of 11.50 and I have no idea how.

The species template isn't that unusual either and I have only 7 pops of them in my own empire.

And on colonies where this species grows, the immigration rate is reaching +11.50 on occasion, but is usually much smaller.

Anyway, just a fun observation.

 

[Ryika]

Each free job gives Immigration Pull, and each free housing multiplies the effect. High stability increases the effect further, as does the Luxuries Distributed modifier, and a bunch of other effects that may be active.

The guy probably has a bunch of migration treaties and is leeching pops from all over the place, that's how the planet arrives at the maximum of 10 immigration.
That value is then further modifierd through the Corvee System Civic.

 

[TrotBot]

Wait. Why the hell should corvée system get an immigration bonus? Space feudalism is literally one of the worst living standards you could move to.

 

[Ryika]

Strictly speaking, it doesn't get an immigration bonus, it gets a pop growth from immigration multiplier, which I guess symbolizes the high efficiency with which you handle the (forced) migration of your pops.

The "pop growth from immigration" modifier doesn't make a lot of literal sense in general, since it just generated pop growth out of thin air. For every 1 "immigration" that arrives at a planet you somehow gain 1.15 "growth from immigration".

 

[Dr. B]

It is best not to ask where those extra pop parts from immigration come from.

 

[aroddo]

my federation members regularily vote to enable/disable free migration - and the vote always succeeds.
and once free migration is disabled, all immigration ceases because I can't be arsed to make a dozen migration treaties every time the tossers decide to flip the law.

I think that when there is no free migration, most members think that's a good idea because they get extra pops.
Then they notice that some few members leech up all their pops and decide to end free migration. repeat.

 

[Willy Waggler]

Since my population growth is pretty much stunted due to size, I frequently absorb my subjects, relocate their pops to my colonies and then release that sector again as vassal.

Why are you putting up with one of the most dumbest mechanics they implemented into the game?
Just putto 0 that thing instead of trying to game it.

 

[Empire of Terra Nova]

my federation members regularily vote to enable/disable free migration - and the vote always succeeds.
and once free migration is disabled, all immigration ceases because I can't be arsed to make a dozen migration treaties every time the tossers decide to flip the law.

I think that when there is no free migration, most members think that's a good idea because they get extra pops.
Then they notice that some few members leech up all their pops and decide to end free migration. repeat.

yeah, it's pretty annoying always being disturbed by the advisor due to migrtion treaty offer spam, just because another federation member initiated a voting on that (and everyone, except me, agrees) only to initiate another voting once the cooldown is over (having once again everyone except me agree to that)

 

[Fulgrymm]

I find that the only way to stop the AI from screwing around is to become the senate, and then create the imperium. Kind of a long term operation, but it gives me something to work towards while I await the crisis.

 

[Dr. B]

I find that the only way to stop the AI from screwing around is to become the senate, and then create the imperium. Kind of a long term operation, but it gives me something to work towards while I await the crisis.

You could also purge all the inferior xeno lifeforms. It works for many things.