Telecommunication industry has gained a great deal of importance both for developed and developing countries in the global economy. Telecommunication services, which are necessary infrastructure investment for countries to develop economically and to keep their growth, occupy a more important position in rapid changing technology and in the globalizing economy of our day. The goal of this study is to analyze the impacts of the privatization, liberalization and regulations on the telecommunication sector on OECD countries have been researched in accordance with the literature through the Fixed Effects Model, Random Effects Model and Hausman–Taylor Model among the panel data analysis methods. In order to analyze the economic development variation, OECD countries have been divided into two groups empirical studies. According to results of the research, it is concluded that the reforms for the telecommunication sector have different impacts for the countries in different group of income. Consequently, it has found out that aforementioned mathematical methods could have significant results in analyzing the economical impacts on the telecommunication sector for OECD countries.