Store brand introduction in a dual-channel supply chain: The roles of quality differentiation and power structure

•We study SB introduction in a dual-channel supply chain with power structure.•SB introduction favors the retailer only when the SB?s quality exceeds some values.•Increasing the retailer?s power may not necessarily incentivize SB introduction.•Any firm could suffer from its increased power when SB introduction happens.•The manufacturer may abdicate power to mitigate losses resulting from SB introduction.