The key to the GDP per capita gap between Madrid and Catalonia: 220,000 workers from other regions. The Chamber of Commerce rules out that the difference is due to productivity. These workers add to Madrid's GDP but not to its population, which increases the figure. He concludes that the capital is "growing at the expense of the communities around it".

The key to the GDP per capita gap between Madrid and Catalonia: 220,000 workers from other regions. The Chamber of Commerce rules out that the difference is due to productivity. These workers add to Madrid's GDP but not to its population, which increases the figure. He concludes that the capital is "growing at the expense of the communities around it".