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Research on service innovation appears in several research disciplines, with important contributions in marketing, management, and operations research. Although the concept is widely used, few research papers have explicitly defined service innovation. This dearth of research is the motivation for the present study. Through a systematic review of 1301 articles on service innovation appearing in academic journals between 1979 and 2014, this article examines research defining service innovation. The study identifies the key characteristics within 84 definitions of service innovation in different perspectives (assimilation, demarcation and synthesis) and shows how the meaning of the concept is changing. The review suggests that the large variety in definitions limits and hinders knowledge development of service innovation.

Service innovation acts as society's engine of renewal and provides the necessary catalyst for the service sector's economic growth. Despite service innovation's importance, the concept remains fuzzy and poorly defined. Building on an extensive and systematic review of 1,046 academic articles, this research investigates and explores how service innovation is defined and used in research. Results identify four unique service innovation categorizations emphasizing the following traits: (1) degree of change, (2) type of change, (3) newness, and (4) means of provision. The results show that most research focuses inward and views service innovation as something (only) new to the firm. Interestingly, service innovation categorizations appear to neglect both customer value and financial performance.

The COVID-19 pandemic has transformed the way services are delivered. In this editorial, we shine a light on how frontline service employees are coping with the changing work environment. Leveraging insights from a critical incident technique data collection, we identify challenges related to employee morale, interfacing with service consumers, and transformational negative events. We then offer suggestions for future research on these topics. Moreover, we discuss how the business model transformations caused by COVID-19 could impact the role of technology in future service interactions as well as new challenges related to demand planning. We hope this editorial can serve as a platform to positively impact future research on how service is being delivered amidst the COVID-19 pandemic and future market shocks.

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