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Since the relationship between patents and Tobin’s q is confusing, this paper utilizes panel threshold regression model to re-examine the relationship between patent counts/sales and Tobin’s q. This study finds out patent citations/sales has a single threshold effect on the relationship between patent counts/sales and Tobin’s q in the US pharmaceutical industry. The single threshold value of patent...
This study applies the artificial neural network technique to explore the influence of the patent performance upon the market value of the pharmaceutical companies in US. The result shows that Herfindahl-Hirschman Index of patents has the negative influence upon the market value of the pharmaceutical companies in US, and the technological independence has the positive influence upon their market value...
This study uses data envelopment analysis (DEA) to explore the efficiency of the computer communication equipment industry in United States. The financial data of this study are obtained from the COMPUSTAT database, and the patent data are collected from the United States Patent and Trademark Office (USPTO) database from 2002 to 2004. Moreover, the input variables of this study are total assets, R&D...
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