The goal of here below presented text is the introduction of the concept of the agenda setting and to try to prove the validity of this theory on the thematic field of economic policy in the period from January 2009 to March 2010. For this purpose two data sets were used. The first one, which represents the public agenda, contains the data from continuous research of public opinion realized by the Public opinion research center (CVVM). The second one is the result of the quantitative content analysis of the TV news and presents the importance of the above mentioned thematic field in the media agenda. For proving of the causal relationship in between those two agendas the method of the pair correlations was used. The results confirm the relatively strong correlation between the media coverage of the topic and its position in the public agenda`s framework. It has been proved that an important role in the whole process represents the fact whether the news is domestic or foreign as well as the importance of gender. The time factor appeared also as a main intervening variable.

In the traditional agenda-setting theory, the agenda-setters were the news media and the public has a minimal role in the process of agenda-setting, which makes the public a passive receiver located at the bottom in the top-down agenda-setting dynamics. This study claims that with the development of Information communication technologies, primarily social media, the networked public may be able to set their own agendas through connective actions, outside the influence of the news media agenda. There is little empirical research focused on development and dynamics of public agenda-setting through social media platforms. Understanding the development and dynamics of public agenda-setting may be key to accounting for and overcoming conflicting findings in previous reverse agenda-setting research. This study examined the public agenda-setting dynamics through a case of gun violence prevention activism Twitter network, the #MarchForOurLives Twitter network. This study determined that the agenda setters of the #MarchForOurLives Twitter network are the key Never Again MSD student leaders and the March For Our Lives. The weekly reflected important events and issues and the identified topics were highly co-related with the themes examined in the tweets created by the agenda setters. The amplifiers comprised the vast majority of the tweets. The advocates and the supporters consisted of 0.44% and 4.43% respectively. The tweets made by the agenda setters accounted for 0.03%. The young activists and the like-minded and participatory public could continuously make changes taking advantage of technologies, and they could be the hope in the current and future society.