A new paper investigates the underlying knowledge structure and the evolution of patent valuation methods under two main topics: quantitative and qualitative. The authors (all from Bahçeşehir University in Turkey) searched for peer-reviewed journals that resulted in a review of 129 documents between 1981 and 2021. The paper, “Qualitative and Quantitative Patent Valuation Methods: A Systematic Literature Review,” is in the June 2022 issue of the journal, World Patent Information. An abstract is available if you click here.