Super User

Super User

Ownership Network

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Ownership network of the top 25 financial institutions by worldwide equity holdings.

Dieselgate

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Dieselgate: ownership around VW.

Sector Analysis

Thursday, 04 February 2016 00:00 Published in Dolfin Home

EU-28 sector analysis: aggregated exposure of 3'189'450 firms representing a value of 50.8 trillion USD in 21 sectors in 2012.

Sentiment Map

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Sentiment map of the 751 emojis. Left: negative (red), right: positive (green), top: neutral (yellow). Bubble size is proportional to log10 of the emoji occurrences in the Emoji Sentiment Ranking.

Novak, P. K., Smailović, J., Sluban, B., & Mozetič, I. (2015). Sentiment of emojis. PloS one, 10(12), e0144296.

Members of European Parliament & Twitter

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Influence of MEPs on Twitter

CREATED BY MIHA GRCAR1, DARKO CHEREPNALKOSKI1, IGOR MOZETIC1, and GREGOR FRAS2
1JOŽEF STEFAN INSTITUTE, DEPARTMENT OF KNOWLEDGE TECHNOLOGIES (http://kt.ijs.si), and 2KOLEKTIV (http://kolektiv.si)
This research is supported by the European Commision’s H2020 FET project DOLFINS (GA No. 640772) and FP7 project SIMPOL (GA No. 610704).

Emoji Sentiment

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Emojis in sections A, B, and C of Fig 2. Shown are emojis that occur at least 100 times in the Emoji Sentiment Ranking. Panel A: negative emojis, panel B: neutral (top) and bipolar (bottom) emojis, panel C: positive emojis.

Novak, P. K., Smailović, J., Sluban, B., & Mozetič, I. (2015). Sentiment of emojis. PloS one, 10(12), e0144296.

European Parliament & Retweets

Thursday, 04 February 2016 00:00 Published in Dolfin Home

The core network (top) colored by the actual political groups and the extended network (bottom) colored by the detected communities.

Cherepnalkoski, D., & Mozetic, I. A retweet network analysis of the European Parliament.

Twitter Activity

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Daily time series of Twitter volume for the Nike company. Detected Twitter peaks and actual EA [earnings announcement] events are indicated.

Ranco, Gabriele, Darko Aleksovski, Guido Caldarelli, Miha Grčar, and Igor Mozetič. 2015. “The Effects of Twitter Sentiment on Stock Price Returns.” PloS one 10(9):e0138441. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0138441

The Macro Network

Thursday, 04 February 2016 00:00 Published in Dolfin Home
The “Macro Network”. Assets (deposits, short and long-term loans). Top left: 2005 first quarter, top right: 2008 third quarter, bottom: 2014 first quarter.
 
Source: Garas, A. "Interconnected networks." (2016). Chapter 12. "The Financial System as a Nexus of Interconnected Networks", by Stefano Battiston, Guido Caldarelli, and Marco D’Errico. http://www.springer.com/us/book/9783319239453

Energy & Markets

Thursday, 04 February 2016 00:00 Published in Dolfin Home

Input elements for evaluating the size of the balancing market (i.e. the short time fluctuations in power generation/demand). In panel (a) we show the electric transmission network in Italy; the topology and the physical characteristics of lines and generators are the constraints that influence the power flow. In panel (b) we show the market zone splitting used for managing the congestions of the entire Italian network. In panel (c) we show a typical ODA+ID market (One-Day-Ahead Market + Intraday Market) final output with the detailed contribution of each primary energy source; hence, it represent the day ahead energy needs as foreseen from energy operators. The balancing market takes care of short time fluctuations that occur during the day respect the scheduled ODA+ID output.

Mureddu, Mario, Guido Caldarelli, Alessandro Chessa, Antonio Scala, and Alfonso Damiano. 2015. “Green Power Grids: How Energy from Renewable Sources Affects Networks and Markets.” PloS one 10(9):e0135312. http://journals.plos.org/plosone/article?id=10.1371/jo