5. Limitations and further research
Although this paper advances understanding of ethnic consumer research, empirical testing of our conceptual model is necessary to provide evidence for the plausibility and soundness of the proposed theory. The conceptualization of subjective social inclusion needs further scrutiny, particularly through empirical tests that could provide empirical support for the definition and conceptual dimensionality. Our collection of definitions and descriptions of social inclusion from the extant literature is not exhaustive and may be strengthened through meta-analysis techniques. Future research directions may include 1) conducting qualitative research with ethnic consumers to further explore the concept of social inclusion and its inherent dimensions; 2) developing a new measurement scale for the concept of subjective social inclusion based on the current paper's conceptualization; 3) identifying salient marketing communication factors that have direct impact on the perceived level of subjective social inclusion, such as product category, language, slogan, degree of ethnic embeddedness; 4) examining the causal effects of ethnic primes (e.g., multi- vs. mono-ethnic primes) on ethnic individuals' subjective social inclusion through controlled experimental procedures; 5) empirically testing the proposed model especially the mediation and moderation effects. Future research could also consider the adaptation of the current conceptual framework at different levels of vulnerability: sexual orientation, disability, gender, age or social status.