@techreport{oai:ir.ide.go.jp:00053624,
 author = {Kimura, Koichiro},
 month = {Feb},
 note = {application/pdf, IDP000876_001, This study measures the technological distance between firms within and  across industries as a case study of Chinese firms to investigate firms’ technology  accumulation patterns. Specifically, cosine similarity is used to compare the t echnology positions generated by the patent applications of Chinese firms. The  analysis shows that as the number of patent applications increases, firms tend to  deepen the technological characteristics of each industry and firm while broadening t he variety of technological fields. As a result, although the quantity and quality of t echnologies are critical, understanding the characteristics of technologies as a t echnological structure or system that differs from one firm to another is also crucial.},
 title = {The technological distance between Chinese firms: deepening and diversifying technologies},
 year = {2023}
}