Navigating the dynamic effects of multiple signals: evidence from online physician consultations
研究了在线健康社区中患者生成信号（从众和口碑）与医生生成信号（核心努力和外围努力）对医生咨询的动态交互效应，发现外围努力信号增强口碑效应但削弱从众效应，核心努力信号则随强度增加替代口碑效应。
Purpose Existing research has provided limited insights into the dynamic mechanisms through which multiple signals are interpreted within online health communities (OHCs). This study attempts to initiate a more integrative understanding of the dynamic interaction effects between patient-generated signals (i.e. herding and word-of-mouth signals) and physician-generated signals (i.e. central effort and peripheral effort signals) on online physician consultations. Design/methodology/approach This study adopts a dynamic panel modelling approach, applying longitudinal data collected from 844 physicians from June to December 2020. Specifically, the two-step system, generalised method of moments (GMM) with instrumental variables and propensity score matching (PSM) were employed to estimate the proposed research model. Findings This research provides empirical evidence that the herding signal and the word-of-mouth (WOM) signal have a positive effect on physician consultations within OHCs. Our findings also demonstrate that the peripheral effort signal complements the effect of the WOM signal on physician consultations, whereas it substitutes for the influence of the herding signal on physician consultations. In addition, this study finds that the central effort signal substitutes the effect of the WOM signal on physician consultation as it intensifies. Originality/value This study contextualises and frames a multidimensional signal framework of the herding signal, the WOM signal, the central effort signal and the peripheral effort signal in OHCs, which augments the predominant applications of signalling theory in e-commerce contexts. Furthermore, this research broadens the theoretical comprehension of signalling theory by revealing the substitutive and complementary effects among these signals, particularly in a mixed signalling environment.