2,519 research outputs found
Competition, Consumer Welfare and Monopoly Power
An applied general equilibrium analysis of monopoly power is proposed as an alternative to the partial equilibrium analyses of monopoly pricing current in antitrust economics. This analysis introduces a new notion of market equilibrium where firms with monopoly power are cost-minimizing price-takers in competitive factor markets and make supracompetitive profits in equilibrium, i.e., the monopoly price exceeds the marginal cost of production. We assume that the primary goals of antitrust policy are the promotion of competition and the enhancement of consumer welfare. To that end, we use Debreu's coefficient of resource utilization to determine the counterfactual competitive price levels in monopolized markets and then impute the economic costs of monopolization.Monopoly power, Antitrust economics, Applied general equilibrium analysis
The Social Cost of Monopoly Power
A general equilibrium analysis of monopoly power is proposed as an alternative to the partial equilibrium analyses of monopolization common to most antitrust texts. This analysis introduces the notion of a cost minimizing market equilibrium. The empirical implications of this equilibrium concept for antitrust policy is derived in terms of a family of equilibrium inequalities over market data from observations on a market economy with competitive factor markets. The social cost of monopoly power is measured using Debreu's coefficient of resource utilization. That is, we propose Pareto optimality as the ultimate objective of antitrust policy.Monopoly power, Antitrust economics, Applied general equilibrium analysis
Relativistic Hartree-Bogoliubov description of sizes and shapes of A=20 isobars
Ground-state properties of A = 20 nuclei (N, O, F,
Ne, Na, Mg) are described in the framework of Relativistic
Hartree-Bogoliubov (RHB) theory. The model uses the NL3 effective interaction
in the mean-field Lagrangian, and describes pairing correlations by the pairing
part of the finite range Gogny interaction D1S. Binding energies, quadrupole
deformations, nuclear matter radii, and differences in radii of proton and
neutron distributions are compared with recent experimental data.Comment: LaTeX 11 pages, 6 eps figs, submitted to Nucl. Phys.
Furrow erosion and aggregate stability variation in a Portneuf silt loam
Numerous soil factors, including aggregate stability, affect erosion rates from irrigated furrows.
Since aggregate stability varies within growing seasons, furrow erosion may vary as well. The study
objectives were to (1) measure furrow erosion and aggregate stability periodically over two growing
seasons, (2) statistically characterize the temporal variation in furrow erosion and aggregate stability,
and (3) relate variation in erosion rates to changes in aggregate stability and other soil properties.
Erosion rates from replicated, previously unirrigated furrows in fallow plots on a Portneuf silt loam
coarse-silty, mixed, mesic Durixerollic Calciorthid) at Kimberly, Idaho, USA, were measured every
2-3 weeks from mid-May through mid-August 1988, and from late-April to late-August 1989. During
each 6.5-h irrigation, three furrows in 1988 and four furrows in 1989 were irrigated at an inflow rate
of 11.3 1 min-1. At each irrigation, soil samples were taken to a depth of 5 cm from the bottom of
furrows adjacent to or near those irrigated. From these samples, soil gravimetric water content was
measured and aggregate stability was determined by wet sieving. Erosion from furrows not previously
irrigated varied greatly when measured throughout two growing seasons. For both years, erosion rates
were significantly lower later in the growing season than earlier. For a 4.0% slope area in 1988, furrow
erosion rates varied over the entire season by a factor of six or more while aggregate stability varied
( increased) by only 17%. Thus, aggregate stability was not significantly correlated with furrow
erosion rates
Effects of Short Range Correlations on Ca Isotopes
The effect of Short Range Correlations (SRC) on Ca isotopes is studied using
a simple phenomenological model. Theoretical expressions for the charge
(proton) form factors, densities and moments of Ca nuclei are derived. The role
of SRC in reproducing the empirical data for the charge density differences is
examined. Their influence on the depletion of the nuclear Fermi surface is
studied and the fractional occupation probabilities of the shell model orbits
of Ca nuclei are calculated. The variation of SRC as function of the mass
number is also discussed.Comment: 11 pages (RevTex), 6 Postscript figures available upon request at
[email protected] Physical Review C in prin
Field corn response to nitrogen as affected by previous winter crop
Testing double cropping systems in the irrigated areas of the Pacific Northwest
led us to evaluate late-planted corn response to N fertilizer when following either a
winter cereal grown for silage or winter peas plowed down as green manure
Isospin Effects on Strangeness in Heavy-Ion Collisions
Kaon properties are studied within the framework of a fully covariant
transport approach. The kaon-nucleon potential is evaluated in two schemes, a
chiral perturbative approach and an effective One-Boson-Exchange model. Isospin
effects are explicitly accounted for in both models. The transport calculations
indicate a significant sensitivity of momentum distributions and total yields
of isospin states on the choice of the kaon-nucleon interaction.
Furthermore, isospin effects are rather moderate on absolute kaon yields, but
appear on strangeness ratios. This is an important issue in determining the
high density symmetry energy from studies of strangeness production in
heavy-ion collisions.Comment: 15 papes, 5 figures. Accepted for publication in Nuclear Physic
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