RT Article T1 The role of institutional uncertainty for social sustainability of companies and supply chains JF Journal of business ethics VO 173 IS 4 SP 813 OP 833 A1 Kelling, Nikolas K. A1 Sauer, Philipp Christopher A1 Gold, Stefan 1977- A1 Seuring, Stefan 1967- LA English PB Springer Science + Business Media B. V YR 2021 UL https://www.ixtheo.de/Record/1774591057 AB Global sourcing largely occurs from so-called emerging markets and developing economies (EMDEs). In these contexts, substantial leverage effects for sustainability in supply chains (SCs) can be expected by reducing adverse impacts on society and minimising related risks. For this ethical end, an adequate understanding of the respective sourcing contexts is fundamental. This case study of South Africa’s (SA) mining sector uses institutional theory and the notion of institutional uncertainty to empirically analyse the challenges associated with establishing social sustainability. The case study research is informed by 39 semi-structured interviews with top management representatives and various state and non-state decision makers in SA. Our findings suggest that (social) sustainability in the institutional field is mainly shaped by the Social and Labour Plan institution, induced by state actors and mining companies’ practices. However, four weakening factors were identified that adversely affect this regulative institution, drive institutional uncertainty and allow for mining companies’ gradual decoupling. Contrastingly, complementing pressures of non-state actors limit institutional uncertainty and push toward mainstreaming the stipulations of the institution. This study contributes to the business ethics literature by providing an in-depth exploration of institutional uncertainty’s drivers and barriers within an upstream SC setting and shedding light on multiple actors’ interplay and relevance in sector-wide sustainability. The findings are condensed into three main propositions as well as an analytical framework as a basis for follow-up research. This case study helps practitioners understand and manage complexity that results from actor plurality and institutional uncertainty in EMDEs. K1 Compliance K1 Decoupling K1 Institutional uncertainty K1 Mineral resources K1 Social sustainability K1 Aufsatz in Zeitschrift DO 10.1007/s10551-020-04423-6