“…The union density, the collective agreement coverage, the coordination and centralisation of collective bargaining often differ across both countries and between sectors with collective bargaining being weaker in private services than manufacturing (Bechter et al, 2012; Leonardi & Pedersini, 2018). These differences are often considered contributing factors as to why there are examples of collective bargaining eroding, but only in certain areas of the labour market and account for increased bargaining fragmentation (Marginson & Dølvik, 2020). Oberfichter and Schnabel (2017) note that IR systems, like the German, increasingly resemble a Swiss cheese that from the outside appears fairly resilient with formal national collective bargaining institutions, but with holes inside as collective bargaining covers a shrinking core of workers, notably in larger companies and certain sectors like manufacturing—aspects echoed by other research, but with important country variations (Artus, 2012; Molina, 2014; Müeller et al, 2019).…”