**Table 1. Data sources and assumptions**

|**2000**|**Data on the stock of**<br>**immigrants**|**Definition of**<br>**immigrants**|**Main source**|**Age**|**Education**|**Additional - and temporary - assumptions in release 1.0 (see footnote)**|
|---|---|---|---|---|---|---|
|**Australia**|Census|Count. Birth|Australian Bureau of Stat.|25+|Avail.|-|
|**Austria**|Census|Count. Birth|Central Statistical Office|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**Belgium**|Census|Count. Birth|National Institute of Stat.|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**Canada**|Census|Count. Birth|Stat. Canada|25+|Avail.|-|
|**Czech Rep**|Census|Count. Birth|Czeck statistical office|25+|Avail.|-|
|**Denmark**|Admin. register|Count. Birth|Stat. Danemark|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**Finland**|Admin. register|Count. Birth|Statistic Finland|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**France**|Census|Count. Birth|Nat. Inst. of Stat. and Econ. studies|25+|Avail.|-|
|**Germany**|Microcensus|Citizenship|German Mircocensus|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**Greece**|Census|Citizenship|European Council + Labor Force Survey|Estim.|Estim.|-|
|**Hungary**|Census|Count. Birth|Hungarian Central Statistic Office|25+|Avail.|-|
|**Iceland**|Admin. register|Count. Birth|Stat. Iceland|Total|Not Avail.|-|
|**Ireland**|Census|Count. Birth|Central Stat. Office|25+|Avail.|Count. birth estimated on Irish Census. Educ. attainment & share of 25+ on LFS|
|**Italy**|Census|Citizenship|National Statistical Institute|25+|Avail.|Citizenship estimated on EC. Educ. attainment as the rest of OECD|
|**Japan**|Admin. register|Citizenship|Ministry of Justice|Total|Not Avail.|-|
|**Korea**|Population register|Citizenship|National Statistical Office|Total|Not Avail.|-|
|**Luxemburg**|Census|Count. Birth|Nat. Inst. of Stat. and Econ. studies|25+|Avail.|-|
|**Mexico**|Census|Not Avail.|None|Total|Not Avail.|-|
|**Netherlands**|Census|Count. Birth|Statistic Netherlands|15+|Estim.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**New Zealand**|Census|Count. Birth|Stat. New Zeland|15+|Avail.|-|
|**Norway**|Admin. register|Count. Birth|Stat. Norway|25+|Avail.|Citizenship estimated on EC. Educ. attainment as the rest of OECD|
|**Poland**|Census|Count. Birth|Central Statistical Office|13+|Avail.|-|
|**Portugal**|Census|Count. Birth|National Institute of Stat.|25+|Avail.|Educ. attainment as the rest of OECD|
|**Slovak Rep**|Census|Count. Birth|Statistical office of the Slovak Rep|25+|Avail.|-|
|**Spain**|Census|Count. Birth|Instituto national de estadistica|25+|Avail.|Educ. attainment & share of 25+ on LFS|
|**Sweden**|Census|Count. Birth|Stat. Sweden|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**Switzerland**|Census|Count. Birth|Swiss Federal Statistical Office|18+|Avail.|-|
|**Turkey**|Census|Count. Birth|State institute of Stat.|25+|Avail.|-|
|**United Kingdom**|Census|Count. Birth|National Stat.|25+|Avail.|Citizenship estimated on EC. Educ. attainment & share of 25+ on LFS|
|**United States**|Census 1% sample|Count. Birth|US Burau of Census(IPUMS)|25+|Avail.|IPUMS Sample 1%|

<u>Notes (*):</u> _EC = European Council data providing the immigration structure by country of citizenchip for European data_ _LFS = European Labor Force Survey data providing data on country of birth and educational attainment in EU-15 countries_