Rifki, Omar; Ono, Hirotaka; Kagawa, Shigemi - In: Journal of Economic Structures 6 (2017) 3, pp. 1-29
Finding environmentally significant clusters in global supply-chain networks of goods and services has been investigated by Kagawa et al. (Soc Netw 35(3):423-438, 2013a; Econ Syst Res 25(3):265-286, 2013b; Glob Environ Chang, 2015), using the popular clustering method of nonnegative matrix factorization,...