This study explores whether ethnic differences in formal and informal networks also result in differences in social capital resources. The study fits into a broader research project that focuses on the role of individual social capital in explaining ethnic inequalities in labour market outcomes. Following the social capital theory, ethnic differences in labour market outcomes can be explained to some extent by differences in the access to and the mobilization of social capital. In previous research, the ethnic inequality in the access to social capital has been measured by social network measures, like the ethnic composition of the social contacts and the active membership of voluntary organizations. However, these social network measures are just proxies for the access to social capital, because there are not directly measuring the resources embedded in the social networks. Moreover, these studies state that ethnic bridging ties are better than ethnic bonding ties, because there are bridging into a network rich of resources. This is, however, not yet explicitly tested. Therefore, the aims of this study are to examine whether (1) there is ethnic inequality in the access to social capital and (2) the widely used social network measures (e.g. ethnic composition of the friendship network and membership of voluntary associations) assess adequately social capital resources. For these purposes, we use the position generator methodology. The position generator asks whether the respondent “knows” anyone having an occupation from a systematic list of 10-30 different occupations. Subsequently, different social capital measures can be calculated (e.g. volume of social capital and the composition of social capital). For this study, we use the first wave of the first cohort of the ASK-dataset. This data contains information about 1296 last-year vocational high school students in two multi-ethnic cities in Belgium. Belgium is an interesting case because of its high socio-economic ethno-stratification, and its old and new ...