%X This study investigates empirically how residence in ethnic enclaves affects labour market outcomes of refugees. Self-selection into ethnic enclaves in terms of unobservable characteristics is taken into account by exploitation of a Danish spatial dispersal policy which randomly disperses new refugees across locations conditional on six individual-specific characteristics. The results show that refugees with unfavourable unobserved characteristics are found to self-select into ethnic enclaves. Furthermore, taking account of negative self-selection, a relative standard deviation increase in ethnic group size on average increases the employment probability of refugees by 4 percentage points and earnings by 21 percent. I argue that in case of heterogenous treatment effects, the estimated effects are local average treatment effects. %I Centre for Research and Analysis of Migration %D 2006 %L discovery14297 %T Ethnic enclaves and immigrant labour market outcomes: quasi-experimental evidence %N 07/06 %S Discussion Paper Series %C London, UK %A A. Piil Damm