scholarly journals Flows of knowledge from universities and federal laboratories: Modeling the flow of patent citations over time and across institutional and geographic boundaries

1996 ◽  
Vol 93 (23) ◽  
pp. 12671-12677 ◽  
Author(s):  
A. B. Jaffe ◽  
M. Trajtenberg
2020 ◽  
Vol 11 (1) ◽  
pp. 91-104
Author(s):  
Michael Handelsman

The theme of migration is not new for Ecuadorians. In the visual arts and literature, artists have traditionally found the theme of migration to be useful when interpreting the personal and existential experiences of individuals living outside of Ecuador. Initially, the topic was not understood as a collective phenomenon capable of putting at risk an elusive national identity. Over time, however, the personal drama became a collective tragedy, which defines and conditions in no small measure the cultural, psychological and geographic boundaries of a pluri-national Ecuador struggling to re-signify the new cartographies that place and displace a nation in constant migratory movement, both internally and externally. This complex social, migratory and cartographic process of becoming is found in works of literature and the visual arts, which often oscillate between testimonial representations and representational testimonies. My analysis focuses on five works and highlights some of the identity transformations that Ecuador, a country located at the centre of the world, continues experiencing while seemingly adrift, yet fully engaged in re-inventing its multiple moving borders.


2021 ◽  
Vol 51 (4) ◽  
pp. 699-732
Author(s):  
Jorge Nogueira de Paiva Britto ◽  
Leonardo Costa Ribeiro ◽  
Eduardo da Motta e Albuquerque

Abstract This paper presents a database with USPTO patents for selected years between 1991 and 2009, totaling 1,022,490 patents, 786,780 patents with international citations and 4,064,995 cross-border citations - links in our analysis. We evaluate a network from those international links, with nodes that are institutions - patent assignees. The literature review organizes arguments for patent citations as knowledge flows and acknowledges problems such as differences between applicants and examiners citations - an exercise to deal with this problem is presented. This network has firms as the dominant institution. An inter-temporal analysis shows the network growth over time and the preservation of its scale-free structure, evidence of its resilience. Over time, this network evolves, changing the leading sectors in a matrix of interaction between citing and cited patents - indications of changes caused by the emergence of new sectors.


2018 ◽  
Vol 41 ◽  
Author(s):  
David Hirshleifer ◽  
Siew Hong Teoh

AbstractEvolved dispositions influence, but do not determine, how people think about economic problems. The evolutionary cognitive approach offers important insights but underweights the social transmission of ideas as a level of explanation. The need for asocialexplanation for the evolution of economic attitudes is evidenced, for example, by immense variations in folk-economic beliefs over time and across individuals.


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