8,331 research outputs found
Sharing Default Information as a Borrower Discipline Device
Creditors often share information about their customers' credit record. Besides helping them to spot bad risks, this informational exchange acts as a disciplinary device. If creditors are known to exchange data about defaults, borrowers must consider that default on a current lender would disrupt their credit rating with all the other lenders. This raises their incentive to perform. But sharing more detailed information can reduce this disciplinary effect: when lenders only disclose past defaults, borrowers' incentives to perform may be greater than when lenders share all their information. In some instances, by "fine-tuning" the type and accuracy of the information shared, lenders can raise borrowers' incentives to their first-best level.Fiscal policy, national saving, contractionary fiscal expansions
An Accelerating Universe without Lambda: Delta~Gravity Using Monte Carlo
A gravitational field model based on two symmetric tensors, and
, is studied, using a Markov Chain Monte Carlo (MCMC)
analysis with the most updated catalog of SN-Ia. In this model, new matter
fields are added to the original matter fields, motivated by an additional
symmetry (~symmetry). We call them matter
fields. This theory predicts an accelerating Universe without the need to
introduce a cosmological constant by hand in the equations. We
obtained a very good fit to the SN-Ia Data, and with this, we found the two
free parameters of the theory called and . With these values, we have
fixed all the degrees of freedom in the model. The last local value
measurement is in tension with the CMB Data from Planck. Based on an absolute
magnitude for the SN, Delta Gravity finds to be km/(s Mpc). This value is in concordance with the last measurement of the
local value, km/(s Mpc).Comment: latex, 27 pages,15 figure
Matroid toric ideals: complete intersection, minors and minimal systems of generators
In this paper, we investigate three problems concerning the toric ideal
associated to a matroid. Firstly, we list all matroids such that
its corresponding toric ideal is a complete intersection.
Secondly, we handle with the problem of detecting minors of a matroid from a minimal set of binomial generators of . In
particular, given a minimal set of binomial generators of we
provide a necessary condition for to have a minor isomorphic to
for . This condition is proved to be sufficient
for (leading to a criterion for determining whether is
binary) and for . Finally, we characterize all matroids
such that has a unique minimal set of binomial generators.Comment: 9 page
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