H1b proposes that relative market share performance has a negative impact on joint action speed. Models 8, 9 and 10 show that market share change is negatively related to joint action speed (b=−53.79, p b 0.05; b=−37.17, insig.; b=−38.40, p b 0.10), though the significance level varies depending on which control variables are included in the model. Thus, H1b receives weak support.