Since 1946, Statistics Netherlands has regularly conducted research into the regional distribution of income. These studies are mainly based on registers from the Ministry of Finance (the tax registers) and the Dutch municipalities (the population registers = GBA). The final results from the Regional Income Survey (RIO) are based on a sample of over 1.9 million households. Income distributions of persons or households, per part of the country, province, corop area, metropolitan agglomeration, urban region and municipality. Data available from: 2005 These updated figures from the RIO 2005 concern 'further provisional figures'. For RIO 2005, a new production run of the income production system took place at the end of March 2008 with improved input data from the tax registers of 2005. With these improved input data, the number of data to be imputed at the micro level from the previous research years (2004 and 2003) is substantially reduced, so that the output quality improves. The plausibility checks now show that small differences are observed in the numbers and amounts compared to the previous production run at the beginning of this year, which means that we are forced to revise the existing RIO 2005 output. The reference date is 1 January 2006; the data relate to the 2005 research year. Frequency: one-off Because the municipal division changes every year, the results from the RIO are published for each separate research year; merging or splitting municipalities means that all information related to income in a newly formed or split municipality can change considerably, so that comparability over time is not possible.
