Using a national sample of 1,000 employees, this paper examines the proposi
tion that those working in so-called 'black hole' organizations (i.e. where
there is neither a set of progressive HRM practices nor a recognized trade
union) will report more negative attitudes and work experiences than those
in settings where there is either HRM, a trade union presence or both. The
results lend some support to this hypothesis with respect to job satisfact
ion and organizational commitment and in judgements about experiences of fa
irness of treatment and trust in management. However, the most negative vie
ws about employment relations are reported by those who belong to a union i
n workplaces with little HRM. The findings indicate that it is HRM practice
s rather than trade union membership that have the major impact on attitude
s and experiences. Even in black hole organizations some employees report s
atisfaction. This can be largely explained by a positive psychological cont
ract between individual and organization. The implications for the role of
trade unions in the promotion of fairness at work are discussed.