IntroductionThere is an extensive literature on spatial mobility within the labour market dealing with a wide variety of themes such as the spatial mismatch between place of residence and place of work (Holzer, 1991), geographically accessible work as a factor in employability (McQuaid and Lindsay, 2005), and the determinants of labour-market spatial mobility (Coombes and Raybould, 2001;Preston and McLafferty, 1999;Schwanen et al, 2002). Latterly, there has been a growing awareness of place-specific variations in spatial mobility within labour markets both as a policy issue (Blumenberg and Shiki, 2004) and as a methodological theme (Schwanen et al, 2002). We aim to contribute to this body of literature, particularly on place-specific variations, through the examination of the relationship between place of residence and location of workplace at entry to employment for twenty-eight different employment sites across Northern Ireland (NI).In doing so we focus on the`labour sheds' (Vance, 1960) or labour catchments of these employers as a specific element, looking at them from the perspective of the individual, site, and residential contexts that shape the spatial behaviour of individual workers who make up each catchment. Morrison (2005) suggests that this concept, together with that of the`employment field'öthe employment opportunities within