(Non mi pare di averlo visto passare in lista...) https://www.tandfonline.com/doi/full/10.1080/19331681.2019.1572568 This study investigates how the use of Twitter and Facebook affects citizens’ knowledge acquisition, and whether this effect is conditional upon people’s political interest. Using a panel survey design with repeated measures of knowledge acquisition, this study is able to disentangle causality and to demonstrate that more frequent usage of Twitter positively affects the acquisition of current affairs knowledge. The opposite is found for Facebook: More frequent Facebook usage causes a decline in knowledge acquisition. This negative effect of Facebook usage occurred particularly for citizens with less political interest, thereby, amplifying the existing knowledge gap between politically interested and uninterested citizens. -- EN ===================================================================== Prof. Enrico Nardelli Dipartimento di Matematica - Universita' di Roma "Tor Vergata" Via della Ricerca Scientifica snc - 00133 Roma tel: +39 06 7259.4204 fax: +39 06 7259.4699 mobile: +39 335 590.2331 e-mail: nardelli@mat.uniroma2.it home page: http://www.mat.uniroma2.it/~nardelli blog: http://www.ilfattoquotidiano.it/blog/enardelli/ http://link-and-think.blogspot.it/ ===================================================================== --