Research
Questions about moving, answered from the data this site already publishes. Every figure is computed from the source records, every limit is stated, and where the data cannot answer the question we say so instead of estimating.
The cities gaining migrants are not the cities that are growing
Where are foreign populations growing fastest? Across 423 cities, growth is almost unrelated to whether the city is growing at all: 0.11 pooled, near zero by country.
Read the analysis →Where foreign populations grew, unemployment fell
Does migration follow work? Pooled across 359 cities the link looks absent at 0.12 — but Germany is −0.41 and Italy −0.34 once the countries are separated.
Read the analysis →More foreign residents, more crime? The answer changes at every border
Does a larger foreign population mean more recorded crime? It depends on the country: 0.06 in Germany and the US, 0.50 in Spain and Belgium, 0.59 in the Netherlands.
Read the analysis →The highest salary is rarely the best offer
Gross salary cannot tell you what is left after tax. Across 33 countries pay tracks grocery prices at 0.80, and the ranking mixes two different source families.
Read the analysis →German rent tracks density and jobs — not crime, not clean air
What does rent price in across Germany? Across 399 districts it tracks density and size, moves against unemployment, and barely moves with crime or air quality.
Read the analysis →Clean air barely shows up in the rent
Do you pay more rent for cleaner air? Across 392 German housing markets the link is weak — Spearman −0.12 — and 31 districts sit below the median on both.
Read the analysis →