Milena Nikolić

Modern technologies offer many opportunities to companies everywhere in the world. Marketing's and manager's job is to get to know all those possibilities, to know their positive and negative side, put it in context and use it in marketing strategy in order to upgrade business of the company, improve sales effectiveness, and finally, raise revenues and value for all stakeholders. This paper contains data on using social networks and technology in advance in company actions, so informations are firstly collected using Facebook, Twitter, Instagram, Google+, Pinterest, LinkedIn, and other social platforms, and the same networks are used to spread informations about business and products, along with feedback used to correct future actions. Informations gathered can be extremely useful, but some can be recognized as unneeded. The main goal of this paper is to show how social networks influence modern businesses and how they can be used as a part of marketing mix in order to improve business effectiveness.

Both in theory and practice, great attention is paid to the analysis of the pension expenditures level, their determinants, as well as the options for their reduction, whereas the analysis of the revenues level and contributions, as the most significant revenue in contribution-based pension systems, is often neglected. The aim of this paper is to analyse the determinants of the level of contributions for pension and disability insurance in order to identify options for increasing their levels in the pension system of the Republic of Serbia. By using the comparative method, a comparative analysis of data about the trends of the most significant determinants of contribution levels among the European Union Member States and Serbia is performed. Research results have shown that increase in the contribution level for pension and disability insurance in the Republic of Serbia can be achieved by extending the definition of contribution base of employees, increasing the average effective retirement age and increasing the effective population coverage by this insurance. In addition to pointing out the options for increasing the contribution level for pension and disability insurance, the authors also propose the measures which can be applied in order to affect the increase of the contribution level for this insurance and, therefore, the total revenues level of the pension system of the Republic of Serbia.