The European Central Bank has published research finding that the euro area labour force expanded by 7.8 million between the fourth quarter of 2019 and mid-2025, reaching 173 million, as higher participation rates and sustained net migration offset demographic ageing and supported more than half of GDP growth in most quarters since the third quarter of 2021. The paper identifies older workers and migrants as the main drivers of recent labour force growth, and says the resulting shift in workforce composition has helped lower aggregate unemployment and ease labour shortages even though average hours worked per employee remain below pre-pandemic levels in several countries. The increase reflects both a 5.8 million rise in the working-age population and an increase in the participation rate from 64.6% in the fourth quarter of 2019 to 66.2% in the fourth quarter of 2025. Over that period, the number of workers aged 55 to 74 rose by 20.2%, the share of workers with tertiary education increased from 34% to 39%, and the female labour force grew faster than the male labour force, although a 9 percentage point participation gap remained. Foreign workers, who represented about 8% of the labour force in 2021, accounted for more than half of labour force growth over the following four years, adding 4.2 million workers and lifting their share to 10%. The participation rate of non-EU citizens rose from roughly 64.1% in 2022 to almost 66.6% in 2025, exceeding that of euro area nationals since 2024. The ECB says these inflows have largely filled high-vacancy sectors rather than raised aggregate unemployment, although skills matching remains weak, with a 40% overqualification rate for non-EU citizens in 2024.