Controlling for supplier switching in the presence of real options and asymmetric information

Applying a real option approach, this paper examines how asymmetric information alters key variables of a firm’s supplier switching process, such as the timing of contracting (hurried versus delayed contracting), transfer payments, set-up, switching, and abandonment decisions. In a symmetric information setting, delayed contracting is unambiguously beneficial. Abandoning the once established relation with the entrant supplier is never an issue. In contrast, under asymmetric information hurried contracting with potentially abandoning the relation can be beneficial. Consistent with adverse selection models, we find that under delayed contracting, in equilibrium, the firm switches less frequently to the entrant supplier (switching inertia). Surprisingly, we also find that under hurried contracting the firm switches more frequently to the entrant supplier (switching acceleration) and may abandon the relation. Finally, we study how these key variables of the supplier switching process change when also the incumbent supplier has private information (two-sided asymmetric information case).     

Unifying darko-lepto-genesis with scalar triplet inflation

We present a scalar triplet extension of the standard model to unify the origin of inflation with neutrino mass, asymmetric dark matter and leptogenesis. In presence of non-minimal couplings to gravity the scalar triplet, mixed with the standard model Higgs, plays the role of inflaton in the early Universe, while its decay to SM Higgs, lepton and dark matter simultaneously generate an asymmetry in the visible and dark matter sectors. On the other hand, in the low energy effective theory the induced vacuum expectation value of the triplet gives sub-eV Majorana masses to active neutrinos. We investigate the model parameter space leading to successful inflation as well as the observed dark matter to baryon abundance. Assuming the standard model like Higgs mass to be at 125–126 GeV, we found that the mass scale of the scalar triplet to be ?O(10⁹) GeV$?O({10}^9)\text{GeV}$ and its trilinear coupling to doublet Higgs is ?0.09 so that it not only evades the possibility of having a metastable vacuum in the standard model, but also lead to a rich phenomenological consequences as stated above. Moreover, we found that the scalar triplet inflation strongly constrains the quartic couplings, while allowing for a wide range of Yukawa couplings which generate the CP asymmetries in the visible and dark matter sectors.     

Re‐parameterization of five‐parameter logistic function

Recently, the five‐parameter logistic (5PL) function has seen increased use as a model for bioassay dose‐response curves. The 5PL function takes curve asymmetry into consideration to overcome some drawbacks of the four‐parameter logistic (4PL) function. These drawbacks include biased estimates of important model parameters, poor characterization of pharmacological pathways and the mechanisms, and inaccurate inference of drug‐receptor interactions. However, currently used 5PL functional form does not have the same practical useful parameter interpretation as the 4PL function. In this paper, we re‐parameterize the 5PL function to preserve the practical useful parameter interpretation of the 4PL. Comparing to the currently used 5PL, the re‐parameterized 5PL function preserves practical useful parameter interpretation of 4PL and has better statistical properties in terms of bias and mean squared error (MSE). Copyright © 2009 John Wiley & Sons, Ltd.     

非对称信息下的后端VMI协调模型

对VMI模式下的两层供应链,在考虑制造商的生产成本信息对称和不对称两种情形下,运用委托-代理理论设计了基于可转移效用-折扣策略的VMI协调机制,有效地改善了分散式供应链结构下由激励不一致、信息不对称等因素引起的供应链效率低下问题,以达到在提高供应链渠道效益的同时,实现制造商和零售商收益的pareto改进.     

沪深300仿真股指期货价格不对称跳跃波动的实证分析

本研究利用2006年10月30日至2009年3月13日期间的仿真的沪深300指数期货每日结算价,探讨了期货价格的不对称跳跃波动行为。在实证研究方法上,本文以Chan和Maheu的GARCH(1,1)-ARJI模型为基础并进行了扩展,以EGARCH(1,1)-CJI和EGARCH(1,1)-ARJI两种模型来刻画股指期货价格的不对称和跳跃波动行为。实证结果显示:(1)沪深300仿真股指期货价格存在不对称跳跃波动,而且跳跃强度不为一固定常数,异常信息所产生的跳跃强度是随着时间变动的。(2)经过似然比检验,结果显示EGARCH(1,1)-ARJI模型比EGARCH(1,1)-CJI模型具有更好的拟合能力。     

一种全方位激光束检测仪

基于单平板的两种旋转特性（绕表面中心法及绕入射光束光轴旋转）作者提出了一种任意剪切方向的全方位剪切干涉仪，这不仅对于旋转对称发光，尤其对于非旋转对称激光束的定量检测具有十分重要的应用价值，文中描述了该仪器原理，参数及应用实例。     

PKA原子和SKA原子对同位素(溅射)富集度的贡献分析

关键词：     

人力资本价值计量模型研究

本文就人力资本价值计量问题引出一种新型投入产出模型——描述人力资本价值生产过程的投入产出模型 .讨论了模型的可行性 ;构造了人力资本价值的可操作性计算模型 .还对这一投入产出模型的非对称性引起的几个基本概念的变异进行了讨论     

Ab initio calculations of of pyridine and its 2- and 3-chloroderivatives

Ab initio calculations of the C₅H₅N, 2-. and 3-ClC₅H₄N molecules by the RHF method in the valence split 6-31G^* basis set with full optimization of the geometry have been carried out. The alternation of the charges on the atoms of the pyridine ring and of the populations of their p _x -orbitals is in agreement with the noninductive through -the-field interaction of the geminal atoms. The³⁵Cl NQR frequencies and the electric field gradient asymmetry parameters at the³⁵Cl nuclei in 2- and 3-CIC₅H₄N were estimated using the populations of the valentp-orbitals of the Cl atoms and their components. The³⁵Cl NQR frequency for the first compound is lower than that for the second one, mainly due to the higher p-electron population of its Cl atom.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2641–2644, November, 1996.