Percorrer por autor "Sequeira, Tiago Lopes"
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- Appropriating the value of intellectual capital : the case of U.S. patentsPublication . Sequeira, Tiago Lopes; Kokkonen, JoniThis dissertation extends the research on patent value by estimating the value of U.S. patent rights using a new model based on the patent renewal model developed by Schankerman and Pakes (1986) and on the findings of Allison et al. (2004) regarding the endogenous characteristics of valuable patents. The research question of this work aims to find what was the compounded annual growth rate of patent value in the United States in the period between 1981 and 1997? Using patent and renewal data, firstly I estimate the distribution of values of the patents granted in the aforementioned period with the patent renewal model. Secondly I construct an equation using a linear regression, which I named Specific Patent Model, where the independent variables are the patent characteristics and its output is the value of a patent. Thirdly, using the Specific Patent Model I generate the present value of U.S. patent rights granted in the period 1981-1997. Finally, it is presented the historical performance of a portfolio of valuable patents which yields a compounded annual growth rate of 0.7% in the period 1981-1997.