The New Immigrant Survey (NIS2NL) is a longitudinal panel study on early integration processes of recent migrants to the Netherlands. NIS2NL is targeted at Bulgarian, Polish, Spanish and Turkish immigrants who recently moved to the Netherlands and contains questions about demographic characteristics, living situation, education, employment, income, language, identification, contact, and perceived discrimination.The data collection for the first wave of NIS2NL was carried out in late 2013 and early 2014. Data for the second wave were collected in late 2014 and early 2015. The third wave was conducted in late 2016 and the fourth in early 2018. Answers were collected in written format either online or on paper. All correspondence with the respondents took place in their native (country of origin) language.In this second version an error related to the Thermometer questions included in wave 4 has been corrected. The fieldwork company had assigned the written questionnaires to the wrong question. The order of these questions were immigrant-group specific which was not accounted for in handling the written questionnaires.The original variables have been kept in the data and renamed into:SOCDISNL_4ERROR (although this was the only one correct in this battery)SOCDIST_4ERRORSOCDISM_4ERRORSOCDISP_4ERRORSOCDISB_4ERRORSOCDISS_4ERRORThe correct variables have the names in line with the codebook:SOCDISNL_4SOCDIST_4SOCDISM_4SOCDISP_4SOCDISB_4SOCDISS_4