"This article unveils the establishment or rejection of strike funds as a tangible organisational tool towards union renewal. Despite strike funds being a necessary and recurring instrument in the organisation of strikes, they have seldom been theorised as a distinct (infrastructural) power resource fundamental to understanding unions' readiness and preparation for industrial conflict. Institutionalised strike funds, supported by union dues, provide economic support to strikers, reinforce their collective identity, legitimise a more confrontational position towards collective bargaining and may garner support from the broader community. Additionally, strike funds may serve as tools to attract members and shape narratives that can influence corporate positions and public opinion during labour disputes. Through a comparative analysis of 10 confederal unions in Spain, we illustrate the different strategic views that unions may hold with respect to them. Crucially, we find that the presence or absence of strike funds reflects the specific political position a union adopts concerning industrial conflict and how they may possibly articulate them with other power resources. Hence, the institutionalisation of strike funds involves a complex union renewal process, which is also influenced by a comparative learning process between unions. Finally, we also explain the flourishing of different strike funds during the last decades that derive from a spillover effect between counterpower and radical unions."

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