Balanced portfolio via signed graphs and spectral clustering in the Brazilian stock market

Quality & Quantity - A portfolio associated with a balanced signed graph that contains both positive and negative edges is more predictable and risk-averse, and is therefore likely to require...     

Patterns of university–industry interactions in Brazil: an exploratory analysis using the instrumental of graph theory

The article seeks to explore the evidence related to the sectoral patterns of structuring of the university–industry relations in Brazil, departing from the information extracted from the database of the Brazil Survey Research, with the analytical contribution of graph theory and its centrality measures. The empirical results allow us to identify some important constraints of the university–industry interactions in Brazil. In particular, we highlight the importance of locational aspects in conditioning the actions of universities as producers of science and technology for the productive sector and a tendency to relatively more intense interaction with less knowledge-intensive sectors, compared to so-called science based sectors.