Zobrazeno 1 - 10
of 275
pro vyhledávání: '"Garas, Antonios"'
Firms' innovation potential depends on their position in the R&D network. But details on this relation remain unclear because measures to quantify network embeddedness have been controversially discussed. We propose and validate a new measure, corene
Externí odkaz:
http://arxiv.org/abs/2205.07677
We consider a multi-layer network with two layers, $\mathcal{L}_{1}$, $\mathcal{L}_{2}$. Their intra-layer topology shows a scale-free degree distribution and a core-periphery structure. A nested structure describes the inter-layer topology, i.e., so
Externí odkaz:
http://arxiv.org/abs/1911.03277
We propose a new measure to quantify the impact of a node $i$ in controlling a directed network. This measure, called `control contribution' $\mathcal{C}_{i}$, combines the probability for node $i$ to appear in a set of driver nodes and the probabili
Externí odkaz:
http://arxiv.org/abs/1906.04663
Using the economic complexity methodology on data for disease prevalence in 195 countries during the period of 1990-2016, we propose two new metrics for quantifying the relatedness between diseases, or the `disease space' of countries. With these met
Externí odkaz:
http://arxiv.org/abs/1903.09703
Publikováno v:
Advs. Complex Syst. 19, 1650009 (2016)
We explore the relationship between human migration and OECD's foreign direct investment (FDI) using a gravity equation enriched with variables that account for complex-network effects. Based on a panel data analysis, we find a strong positive correl
Externí odkaz:
http://arxiv.org/abs/1701.07729
In many complex systems, elements interact via time-varying network topologies. Recent research shows that temporal correlations in the chronological ordering of interactions crucially influence network properties and dynamical processes. How these c
Externí odkaz:
http://arxiv.org/abs/1701.06331
Autor:
Garas, Antonios, Lapatinas, Athanasios
We develop a location analysis spatial model of firms' competition in multi-characteristics space, where consumers' opinions about the firms' products are distributed on multilayered networks. Firms do not compete on price but only on location upon t
Externí odkaz:
http://arxiv.org/abs/1601.05660
How are economic activities linked to geographic locations? To answer this question, we use a data-driven approach that builds on the information about location, ownership and economic activities of the world's 3,000 largest firms and their almost on
Externí odkaz:
http://arxiv.org/abs/1512.02859
We study the role of geography in R&D networks by means of a quantitative, micro-geographic approach. Using a large database that covers international R&D collaborations from 1984 to 2009, we localize each actor precisely in space through its latitud
Externí odkaz:
http://arxiv.org/abs/1509.08291