Abstract
This chapter is the introduction part of this book. In this chapter, we describe the background and point out the research objectives of this book, and then review the relative literature from five perspectives, namely the hesitant fuzzy set, the numerical scales and hesitant fuzzy preferences, the hesitant fuzzy portfolio methods, the fuzzy data envelopment analysis, and the fuzzy VaR measures. In addition, we summarize the main research contributions and five proposed investment models in this chapter. Lastly, we present the research design of this book by a logic flowchart.
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Zhou, W., Xu, Z. (2020). Introduction. In: Qualitative Investment Decision-Making Methods under Hesitant Fuzzy Environments. Studies in Fuzziness and Soft Computing, vol 376. Springer, Cham. https://doi.org/10.1007/978-3-030-11349-0_1
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