The following study identifies five periods with different price regimes (for main hydrocarbons): 1) 1986-1996, where these prices are part of the Government's fiscal policy to finance part of the structural adjustment policies after the inflationary period; 2) 1997-1999, when a new methodology...

Because of the importance of the energy sector's development for the performance and stability of the economy, its analysis has become an intriguing branch of the economic sciences. For this study it should be tested the characteristics of each of the industries that comprise it, as well as make...

This paper is about a model of Bertrand competition in a homogeneous-good market with free entry of identical firms and variable returns to scale. If the optimum number of active firms in the market is two or more, Bertrand equilibrium always exists for that optimum number, and it does not exist...