evidence: - Martinho, G.; Balaia, N.; Pires, A. The Portuguese plastic carrier bag tax: The effects on consumers’ behavior. Waste Manag. 2017, 61, 3–12. [Google Scholar] [CrossRef] [...] - Dikgang, J.; Leiman, A.; Visser, M. Analysis of the plastic-bag levy in South Africa. Resour. Conserv. Recycl. 2012, 66, 59–65. [Google Scholar] [CrossRef]