Bryce et al. (2015) Ramkissoon (2022) Attachment, emotional connection, commitment, and devotion Kumar and Pansari (2016) Customer purchases, customer referrals, customer influence, and customer knowledge Wei et al. (2017) Behavior Pansari and Kumar (2017) Direct (buying) and indirect (customer referrals, customer influence, customer knowledge, customer feedback) Harmeling et al. (2017) Behaviors (voluntary resource contribution) Fang et al. (2017) Psychological (vigor, dedication, and absorption) and behavioral Bilro et al. (2018) Cognitive, emotional, and behavioral Li et al. (2018) Behaviors Harrigan et al. (2018) Absorption, enthusiasm, attention, identification, and interaction Rather (2018b) Absorption, enthusiasm, attention, identification, and interaction Aluri et al. (2019) Cognitive, emotional, and behavioral Choi and Kandampully (2019) Behaviors (willingness to suggest and word of mouth) Bravo et al. (2019) Direct (buying) and indirect (customer referrals, customer influence, customer knowledge, customer feedback) Loureiro and Sarmento (2019) Customer purchases, customer referrals, customer influence, and customer knowledge Rather and Sharma (2018, 2019) Absorption, enthusiasm, attention, identification, and interaction Zhang et al. (2018) Behavior Rather et al. (2019) Conscious attention, enthused participation, and social connection Willems et al. (2019) Cognitive, emotional, and behavioral Islam et al. (2019) Cognitive processing, affection, and activation Flavián et al. (2019) Cognitive, temporal, affective, and behavioral Hollebeek et al. (2019a) Cognitive, affective, and behavioral Ye et al. (2019) Hedonic engagement and utilitarian engagement Rather (2020) Cognitive, affective, and behavioral Fang et al. (2020) Cognitive, emotional, and behavioral Zhang et al. (2020)