The article deals with neighborhood ties to European Union countries in terms of graph theory. It is determined the minimum distance between states and the consequences, in terms of minimum distance, of leaving the European Union by one country or another.

The article aims to determine the optimal level of tax burden in order to maximize the level of GDP. The value obtained from a regression analysis that followed the mathematical modeling of the Laffer curve is 17.39%

Analysis carried out on macro-regions and counties reveals a disproportionate development of areas of Romania, with growth rates of GDP high in Bucharest-Ilfov, but and Gorj, Arad and Timis and very low, even negative in the nearby counties of Arges, Giurgiu Prahova and Teleorman indicating many...

The article is the second in a series that will treat underlying conditions to generate a production function. The importance of production functions is fundamental to analyze and forecast the various indicators that highlights different aspects of the production process. How often forgets that...