In this paper, we conduct numerical experiments based upon the oligopolistic model of electricity market proposed in [1]-[2] and applied to the German electricity market. Presently, the German electricity market is shaped by strategic behavior of energy firms so that a perfect competition market has not been reached as yet. An oligopolistic market structure emerges from the analysis and is char...

Under perfect competition on the output market, first best technology subsidies in the presence of learning by doing are justified by knowledge spill overs that are not accounted for by individual companies. First best output subsidies are thus depending directly on the learning effects and are, if applicable, positive. Considering electricity markets, a setting of imperfect competition is more...

Roussel and Rubio proved a lemma which is essential in the proof of the Strong Perfect Graph Theorem. We give a new short proof of the main case of this lemma. In this note, we also give a short proof of Hayward’s decomposition theorem for weakly chordal graphs, relying on a Roussel–Rubio-type lemma. We recall how Roussel–Rubio-type lemmas yield very short proofs of the existence of even pairs ...

Abstract This paper explores the study of bilateral oligopoly, in which both sellers and buyers have substantial influence on market. We lead readers coherently through key results that emerge from literature oligopoly by means worked examples based same underlying two commodity exchange economy, along with broader consideration relevant literature. allows us to concisely compare different equi...

We will extend Reed's Semi-Strong Perfect Graph Theorem by proving that unbreakable C 5-free graphs diierent from a C 6 and its complement have unique P 4-structure.

This paper addresses the claim that monopolies arise naturally out of the free market. I show by comparing and contrasting two theories of monopoly—economic and political monopoly—that this is not true. This paper also demonstrates that the two theories of monopoly have their separate roots in two opposite theories of competition: perfect competition and competition as rivalry. I show that only...

The Wonderful Lemma, that was first proved by Roussel and Rubio, is one of the most important tools in the proof of the Strong Perfect Graph Theorem. Here we give a short proof of this lemma.

In this paper, we assume that firms can create independent divisions which compete in quantities in a homogeneous good market. Assuming identical firms and constant returns to scale, we prove that the strategic interaction of firms yields Perfect Competition if the number of firms is beyond some critical level. Assuming a fixed cost per firm and an upper bound on the maximum number of divisions...

This paper characterizes the properties of equilibrium location patterns in an Anderson-Neven-Pal model and uses these characteristics to comprehensively find the subgame perfect Nash equilibria, most of which are not yet found in the literature. Since the external competition effect may be exactly canceled out, or internal competition strictly dominates external competition, or the internal co...

The purpose of this study is to examine the terms "perfect" and "imperfect" competition in market structure from an Islamic economic perspective. This employed a qualitative approach library research as its methodology. results literature review indicate that perfect has close relationship with concept. proximity reflected price, which determined according hadith Prophet Muhammad by supply dema...