In this study, the author compares the supply-demand mismatch of retail banking services and the changing patterns in Illinois and New York from 1982 to 2007 amid fundamental banking transformation and geographical deregulation. The study uses measures of concentration like the Herfindahl-Herschman Index (HHI) and the E-Index. The study finds that the traditionally unit banking Illinois has nar...

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...

In horizontal mergers, concentration is often measured with the Hirschmann-Herfindahl Index (HHI). This index yields the price-cost margins in Cournot competition. In many modern merger cases, both buyers and sellers have market power, and indeed, the buyers and sellers may be the same set of firms. In such cases, the HHI is inapplicable. We develop an alternative theory that has similar data r...

interest free banking law at 1363 was implemented in the banking system in iran. one of the main goals of this law was eliminating usury from monetary system, and utilization from non-usury credit impact on economic growth through preferring money contribution in the capital. this paper uses data from years 1363 to 1386 and implementing herfindahl-hirschman index, evaluated and ranked concentra...

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...

This paper empirically examines the effect of market competition – measured either by the Herfindahl Index or the Lerner Index – on productivity growth and R&D intensity using micro data for Japan’s manufacturing sector. We found evidence of an inverted U-shaped relationship between competition and innovation when we use the Herfindahl Index as a measure of competition in the market. In additio...

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. Unfortunately, market power considerations within electric power markets require the co...

This paper challenges recent research (Evans, 2008) reporting that the concentration of cited scientific literature increases with the online availability of articles and journals. Using Thomson Reuters’ Web of Science, the present paper analyses changes in the concentration of citations received (twoand five-year citation windows) by papers published between 1900 and 2005. Three measures of co...

Abstract The topic of finding effective strategies to restrain epidemic spreading in complex networks is current interest. A widely used approach for containment the fragmentation contact through immunization. However, due limitation immune resources, we cannot always fragment network completely. In this study, based on size distribution connected components network, designed a risk indicator o...