Interval graphs and seatching

AbstractThe interval thickness of a graph G is the minimum clique number over any interval supergraph of G. The node-search number is the least number of searchers required to clear the ‘contaminated’ edges of a graph. The clearing is accomplished by concurrently having searchers on both of its endpoints.We prove that for any graph, these two parameters coincide

Online competition : examining competition between online and dual-channel retailers in the Norwegian electronics market

The purpose of this thesis is to explore competition among retailers online. Online retailing has grown significantly in recent years and is expected to keep growing. Simultaneously, traditional brick-and-mortar retailers are experiencing less growth. Many traditional brickand-mortar retailers have chosen to adapt by entering the online channel, becoming dualchannel retailers. It is generally anticipated that the online channel is more competitive than traditional brick-and-mortar retailing, due to lower search costs, technology and barriers to entry. As dual-channel retailers operate in both markets, we wish to examine how this will affect their prices. We test the hypothesis of online efficiency through looking at the price levels and dispersion of online and dual-channel retailers. We use a quantitative research methodology to examine whether online and dual-channel retailers prices are different. Using price data from various retailers within the electronics industry, we look at price levels and price dispersion to study competition between the retailer types. The results show that the prices of online and dual-channel retailers are significantly different. However, the results were the opposite of what we predicted, given the theory. We found that dual-channel retailers have significantly lower prices and lower price dispersion compared to online retailers. The results do not therefore support the existence of an online disutility cost, or the notion of online channel efficiency.nhhma

Bevoelkerungswachstum und Familienplanung in Entwicklungslaendern

SIGLEUuStB Koeln(38)-940106470 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman