864 research outputs found
Bertrand Competition with an Asymmetric No-Discrimination Constraint
Abstract: We study the competitive and welfare consequences when only one firm must commit to uniform pricing while the competitorâs pricing policy is left unconstrained. The asymmetric no-discrimination constraint prohibits both behaviour-based price discrimination within the competitive segment and third-degree price discrimination across the monopolistic and competitive segments. We find that an asymmetric no-discrimination constraint only leads to higher profits for the unconstrained firm if the monopolistic segment is large enough. Therefore, a regulatory policy objective of encouraging entry is not served by an asymmetric no-discrimination constraint if the monopolistic segment is small. Only when the monopolistic segment is small and rivalry exists in the competitive segment does the asymmetric no-discrimination constraint enhance welfare.Dominant firms;price discrimination;competition policy;regulation
Price Discrimination Bans on Dominant Firms
Competition authorities and regulatory agencies sometimes impose pricing restrictions on firms with substantial market power â the âdominantâ firms. We analyze the welfare effects of a ban on behaviour-based price discrimination in a two-period setting where the market displays a competitive and a sheltered segment. A ban on âhigher-prices-to-shelteredconsumersâ decreases prices in the sheltered segment, relaxes competition in the competitive segment, increases the rivalâs profits, and may harm the dominant firmâs profits. We show that a ban on âhigher-prices-to-sheltered-consumersâ increases the dominant firmâs share of the first-period market. A ban on âlower-prices-to-rivalâs-customersâ decreases prices in the competitive segment, lowers the rivalâs profits, and augments the consumer surplus. In particular, while second-period competition is relaxed by a ban on âlower-prices-to-rivalâscustomersâ, first-period competition is intensified substantially, which leads to lower prices âon-averageâ over the two periods. Our findings indicate that a dynamic two-period analysis may lead to conclusions opposite to those drawn from a static one-period analysis.dominant firms;price discrimination;competition policy;regulation
Complex band structure and plasmon lattice Green's function of a periodic metal-nanoparticle chain
When the surface plasmon resonance in a metal-nanoparticle chain is excited
at one point, the response signal will generally decay down the chain due to
absorption and radiation losses. The decay length is a key parameter in such
plasmonic systems. By studying the plasmon lattice Green's function, we found
that the decay length is generally governed by two exponential decay constants
with phase factors corresponding to guided Bloch modes and one power-law decay
with a phase factor corresponding to that of free space photons. The results
show a high level of similarity between the absorptive and radiative decay
channels. By analyzing the poles (and the corresponding residues) of the
Green's function in a transformed complex reciprocal space, the dominant decay
channel of the real-space Green's function is understood.Comment: 19 pages, 3 figure
63 Resveratrol improves chloride secretion in cystic fibrosis mice homozygous for the F508del mutation
- âŠ