Methodology Infographic Data Footballers and Investments
While conducting research for the creation of our indicators (Net Worth, Average Salary, Car, Car Price, and House Price) - several kinds of sources were used to cross-check the data. This ranged from articles released by well-known and reliable newspapers (such as the Daily Mail and Spiegel) to analysis from databases with contrasting information about players from around the world. The results were validated by comparing all available sources.
For an even more precise result, a mathematical average was applied in cases where the data showed discrepancies considered to be too wide.
As it’s possible to have marginal errors in some of the data, the analysis was cross-checked with the world’s largest database of user contributed data about cities and countries. The advantage of this tool (which contains numerical and other itemizable data), is that it’s designed to provide current and timely information, giving us the most accurate overall picture.
The average salary indicator reports the average monthly net salary in euros (meaning after taxes are deducted).
The database provides the price of both the first and second most commonly found cars in the country. To find the mean for this indicator, a mathematical average was applied using both values.
This indicator consists of three sub-indicators, with two being: House City Centre and House Outside City Centre – this is to reflect the purchase price per square meter (in Euros) in the city center and the outskirts, respectively.
Through detailed research, the average house surface area for each of the four countries was analyzed. Once this value was determined, it was multiplied by the above indicators to obtain the average house price both inside and outside the city center. Finally, a mathematical average was applied to show the average house price per country.