Immigration and Government Budgets

I'm not well informed about the demographics of all EU immigrants in the time period considered. Usually immigrants provide net benefits.

Though for some countries (such as Sweden) it is a bit less obvious than for others, especially if migrants do not integrate well.

Past may not be a good predictor. Depends on the composition, about which I know too little.

Typically younger adults and some with a relatively good educational background.

A bit less sure for refugees than for economic migrants

To guarantee this outcome the States should invest generously in training and integrating the least qualified immigrants (refugees)

it delends whether the question refers to immigrants who have been accepted as residents, under various, hats, or "economic migrants

As employment rate among migrants goes up over time, and much of taxation is indirect anyway, chances are that the statement comes true.

In welfare states with poor integration the net monetary gain is likely negative. This does not mean one should not allow asylum seekers.

Too early to tell. Labor mkt outcomes often worse for long time. Demographics are plus. Much depends on fast integration into lab mkt.
-see background information here
-see background information here

Simple demographics: all the studies I know show that, on average, immigrants are younger, healthier and have fewer dependents than natives

Excellent research on this issue produced for UK Migration Advisory Committee and available on their website.

Migrants likely to be young and eager to find jobs.

Migrants to Europe are often not allowed to work for years. Delayed entry into the labor force can have negative effects on integration

Being younger and typically better educated their fiscal contribution tends to be positive as suggested by recent research for the UK.
-see background information here

At least in terms of the UK, there have been generally positive fiscal benefits. See my work below or recent MAC report by alan Manning
-see background information here

For demographic reasons.