19,268 research outputs found
DEMAND FOR AGRICULTURAL ECONOMIC INFORMATION
Using data gathered in two surveys we analyze the movement of information in agriculture. The relative importance of varying classes of information providers are assessed by classes of users. A network based framework expands models of human capital and bounded rationality to assess the calculus of choice of information.information, bounded rationality, Institutional and Behavioral Economics,
Loss Aversion and Reference Points in Contracts
Loss aversion has become the dominant alternative to expected utility theory for modeling choice under uncertainty. The setting of the base payment in contracts provides an interesting application of referenced based decision theory. The impact of loss aversion on contract structure depends critically on whether reservation opportunities (outside options) are evaluated with respect to the reference point implied in the contract. We show that when reservation opportunities are independent of the reference point, reward contracts are optimal. However, when reservation opportunities are evaluated against the reference point, then penalty contracts are more efficient.Risk and Uncertainty, L14, D81, D21, D82,
STRUCTURAL CHANGE: FARM AND FINANCIAL DIMENSIONS
Industrial Organization,
Weak plaquette valence bond order in the honeycomb Heisenberg model
Using the density matrix renormalization group, we investigate the
Heisenberg model on the honeycomb lattice with first- () and
second-neighbor () interactions. We are able to study long open cylinders
with widths up to 12 lattice spacings. For near 0.3, we find an
apparently paramagnetic phase, bordered by an antiferromagnetic phase for
and by a valence bond crystal for . The
longest correlation length that we find in this intermediate phase is for
plaquette valence bond (PVB) order. This correlation length grows strongly with
cylinder circumference, indicating either quantum criticality or weak PVB
order.Comment: 9 pages, 15 figures, minor changes are made for publication in Phys.
Rev. Let
Unexpected z-Direction Ising Antiferromagnetic Order in a frustrated Spin-1/2 XY Model on the Honeycomb Lattice
Using the density matrix renormalization group (DMRG) on wide cylinders, we
study the phase diagram of the spin-1/2 XY model on the honeycomb lattice, with
first-neighbor () and frustrating second-neighbor ()
interactions. For the intermediate frustration regime , we find a surprising antiferromagnetic Ising phase, with
ordered moments pointing along the z axis, despite the absence of any S_z_z
interactions in the Hamiltonian. Surrounding this phase as a function of
are antiferromagnetic phases with the moments pointing in the plane for
small and a close competition between an plane magnetic collinear
phase and a dimer phase for large values of . We do not find any spin
liquid phases in this model.Comment: 5 pages, 5 figures, minor changes made for publication on PR
- …