We provide an extensive and general investigation of the effects on industry performance (profits and social welfare) of exogenously changing the number of firms in a Cournot framework. This amounts to an in-depth exploration of the well-known trade-off between competition and production efficiency. We establish that under scale economies, welfare is maximized by a finite number of firms. Our r...

The paper examines the impact of marketing segmentation practices on the performance of selected Nigerian commercial banks in the post consolidation era 2005 to date. Data employed were mainly secondary while the research design was exploratory in nature relating such basic variables as market segmentation practices of market share; pricing and geographical branch location to performance. Stati...

Market power refers to conditions where the providers of a service can consistently charge prices above those that would be established by a competitive market. There are many well known definitions of market power, including indices intended to quantify the degree of market concentration of energy supplies. This paper explores a method by which one of the standard indices in market power analy...

Concentration phenomena concern the ICT market. Though the regulatory action has been active mainly in the telecom network operators industry, even more significant worldwide concentration phenomena affect other industries. The market of mobile operating systems is analysed through two concentration indices to get a quantitative picture of the current situation and its evolution over time: the ...

We investigate the impact of Certificate of Need (CON) Law and its stringency on Inpatient market competition measured by the Herfindahl-Hirschman Index (HHI). We show that on average the CON legislation enhances competition between Inpatient units. Additionally, the size, demographics, and health insurance coverage of the state population are found to significantly impact Inpatient market comp...

Comparing Cournot and Bertrand Equilibria Revisited by Jim Y. Jin This paper compares Cournot and Bertrand equilibria with mixed products, linear demand and cost functions. It is found that a firm's price (output) need not be higher (lower) in Cournot equilibrium. However, given any number of firms and a mixture of complement and substitute products, every firm's price margin/output ratio is al...

extended abstract introduction hospitals are the most important and complex social units which are intended to protect the lives of people and to treat and improve them. with the passage of time and progress in science, hospitals have been equipped with more advanced technology and facilities. more active beds in hospitals are indications of specialized manpower, equipment and facilities for th...

This paper analyzes post-socialist industrial development and policy in the Western Balkans through lens of its regional specialization spatial concentration. Against a conceptual framework revolving around place-based policy, using Concentration index (modified Herfindahl-Hirschman index) location coefficients (Balassa index), comparative analysis over three decades (1990–2020) highlights weak...

This paper investigates the pricing of differentiated products in a vertical sector, with a focus on the role of industry concentration. We propose concentration indices that extend the classical Hirschman-Herfindahl Index (HHI) to include vertical structures that manage differentiated products. We also identify how substitution/complementarity among products affects pricing. We compare our pro...

this paper using generalized roeger's model calculated the lerner index for iranian active industries in 4-digit isic codes during the period 1995-2007. the findings indicate that the lerner index has been between 8 to 16 percent in 38 industries among 131 ones. the index also in different industries shows that more than 50 percent of iranian industries have monopolistic power such that th...