**TABLE A.1. Data Description and Sources**

|Variable|Description & Source|N|Mean|SD|
|---|---|---|---|---|
|SMig_ij,t_|Stock of emigrants of educational category “high” aged 25+ born in country_i_and<br>living in OECD country_j_in_t_(2000 or 1990) divided by stock of residents of<br>educational category “high” in country_i_in year_t_. Stock of emigration and stock of<br>“”|<br>3052|0.0246|0.1909|
||residents of educational category high from Docquier, Marfouk and Lowell (2007).||||
|RelGDP_ij,t_|<br>Log of GDP per capita of country_j_minus log of GDP per capita of country_i_in year<br>2000. GDP data from Penn World Table Version 6.2.|<br>3052|1.4360|1.2890|
|RelTFP_ij,t_|Log of TFP (measure TPF_K06) per capita of country_j_minus log of TFP of country<br>_i_in year 2000. UNIDO World Productivity Database, Isaksson (2007).|1983|0.7860|0.7628|
|RelWage80_ij,t_|<br>Log of wage in 80th percentile of country_j_minus log of wage in 80th percentile of<br>country_i_. Wage data from Occupational Wages around the World Database.|1247|1.2650|1.4945|
|RelWage90_ij,t_|<br>Log of wage in 90th percentile of country_j_minus log of wage in 90th percentile of<br>country_i_. Wage data from Occupational Wages around the World Database.|1247|1.1810|1.3953|
|RelWage80to50_ij,t_|<br>Log of wage in 80th percentile of country_j_minus log of wage in 50th percentile of<br>country_i_. Wage data from Occupational Wages around the World Database.|1247|0.9409|1.4348|
|UMig_ij,t-1_|<br>Stock of emigrants of educational category “low” aged 25+ born in country_i_and<br>living in OECD country_j_in_t-1_(1990) divided by stock of residents of educational<br>category “low” in country_i_in_t-1_. Stock of emigration and stock of residents of<br>educational category “low” from Docquier, Marfouk and Lowell (2007).|3052|0.0026|0.0197|
|RelPrimSchool_ij,t-1_|<br>Primary school enrollment in country_j_divided by primary school enrollment in<br>country_i_in_t-1_(1990). Primary school enrollment rate from_GDF_and_WDI_.|2403|1.2040|0.5211|
|RelTertSchool_ij,t-1_|<br>Tertiary school enrollment in country_j_divided by tertiary school enrollment in<br>country_i_in_t-1_(1990). Tertiary school enrollment rate from_GDF_and_WDI_.|2477|10.2700|22.2216|
|RelInvest_ij,t-1_|<br>Investment share in country_j_divided by investment share in country_i_in_t-1_(1990).<br>Investment share from Penn World Table Version 6.2.|3052|2.3350|1.9566|
|RelUrban_ij,t-1_|Urban population share in country_j_divided by urban population share in country_i_in<br>_t-1_(1990). Urban population share from_GDF_and_WDI_.|3013|2.0500|1.8872|
|TotalMig_ij,t-1_|<br>Emigrant population from country_i_living in country_j_divided by population (in<br>thousands) of country_i_in_t-1_(1990). Docquier, Marfouk and Lowell (2007).|3052|1.6870|11.1509|
|TotalMig_ij,1960_|<br>Proxy of emigrant population from country_i_living in country_j_in year 1960.<br>Constructed as described in text, based on data from the United Nations Population<br>Division|3052|1.6120|20.5570|
|Dist_ij_|.<br>Log geodesic distance in km between countries_i_and_j_. Mayer and Soledad (2006).|3042|8.5170|0.9313|
|ComLang_ij_|<br>Dummy variable capturing if same language is spoken by at least 9 percent of the<br>population in country_i_and_j_. Mayer and Soledad (2006).|3052|0.1311|0.3375|
|Contig_ij_|<br>Dummy variable capturing whether countries_i_and_j_are contiguous. Mayer and<br>Soledad (2006).|3052|0.0269|0.1617|

_Note:_ The ranges, means, and standard deviations are not weighted and are based on the respective number of observations. Destination countries are the 30 OECD members. The total number of observations depends on the data availability for destination and source countries. An observation is excluded if bilateral data are not available or the source country does not have any emigrants in the destination country.

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