The article discusses how social inequality is increasing in Dutch cities due to market changes. The researchers studied income and wealth data in four major Dutch cities and found that wealthier people are moving to the city centers, while lower-income groups are being pushed to the outskirts. Cities like Amsterdam and Utrecht are thriving economically, leading to gentrification in the city centers. In contrast, cities like The Hague and Rotterdam have poorer inner-city areas and wealthier suburbs. The differences in economic success and urban profiles play a significant role in shaping the social geography of these cities.