This introductory article provides a preliminary explanation of the cross-national similarities and differences of union revitalization strategies discussed in this special issue. Differences in the institutional context of industrial relations as well as state policies and employer strategies explain some major differences in how national unions are responding to the current socio-economic challenges. However, our findings reveal that union responses are also influenced by their own internal structures. In particular, we use insights of the social movement literature to highlight the importance of the cognitive or `framing' processes through which unions as actors translate and act upon changes in the environment.

This article reviews evidence on the outcomes of British social partnership agreements using matched comparisons. It concludes that in industries marked by employment decline, partnership firms often have shed jobs at a faster rate than nonpartnership firms. However, in expanding sectors, partnership firms have created jobs at a faster rate than nonpartnership rivals. There is no discernible impact of partnership on either wage settlements or union density. It is argued that we need evidence on information sharing, trust, and power and suggested that partnership agreements are unlikely to contribute significantly to union revitalization.

This study examined social psychological factors associated with willingness to participate in collective action. These factors were group identification, collectivist orientation, outgroup stereotyping, perceived intergroup conflict, egoistic and collective relative deprivation, and political efficacy. Three hundred and fifty members of a trade union completed questionnaires where items measured these factors along with their prospective participation in a range of union activities. Regression analyses indicated that the most significant correlate of participation was the strength of the respondent's sense of group identification. Other significant correlates were collectivist orientation and the degree to which the outgroup (management) was perceived in a stereotypical fashion. Further analyses were undertaken to examine the possible moderating effect of group identification on the relationships between independent and dependent variables. These indicated a broadly similar pattern of results for both strong and weak group identifiers though collective relative deprivation appeared to be somewhat more important for strong identifiers and political efficacy somewhat more important for weak identifiers. These findings are discussed in the context of research into social identity and collective action in other settings.