"Almost half of what we can call 'the GDP of immigration' (130.6 billion euros) comes from the service sector, followed by manufacturing and construction," the report highlighted.

Furthermore, migrants paid 3.3 billion euros in income tax (on total 156 billion euros paid), and 11.4 billion euros in contributions to the country's social security (5.4 percent of total) in 2017, the report estimated on data by the Economy Ministry.

Although migration was not to consider a universal solution to population trends, researchers said such figures were especially relevant in the perspective of Italy's demographic decline.

BALANCING A FAST AGEING POPULATION

Italy had a population of 60.5 million, of which 39 million between the ages of 15 and 64, and 13 million aged 65 and over. This meant there were three workers for every two pensioners, according to Chiara Tronchin of the Moressa Foundation.

"The forecast provided by Eurostat (EU statistical office) showed that Italy's population will drop by 3 percent by 2050," the researcher told the conference.

"This would not be a problem, but for the fact that all working age groups are expected to decrease by that date, and the over-65 will be the only group to grow."

In this scenario, Italy would count on one worker for every one pensioner by 2050, which would represent a major threat to the sustainability of the pension system and welfare.

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