Acquired protein appetite in rats: Dependence on a protein-specific need state

Summary Rats are shown to acquire a preference for protein-predictive olfactory cues which depends on a state of mild deficit in protein intake—i.e. a learned protein-specific appetite.This work was supported by a Medical Research Council Studentship awarded to Leigh Gibson.     

卖空威胁与公司避税行为——基于融资融券交易的双重差分检验

以融资融券交易为对象,本文分析了卖空威胁对公司避税行为的影响.在探讨因果关系可识别性的基础上,通过控制自选择偏误,本文采用双重差分模型检验发现:开通融券交易带来的卖空威胁能够抑制管理者避税行为,这一抑制效果对管理者持股的公司更显著.进一步研究发现卖空威胁对避税行为的抑制受公司外部环境影响.具体而言,当公司所处省份税收征管强度较低时,抑制作用更显著.后续证据显示,激进的避税行为确实能够吸引融券交易者的卖空兴趣,但并未作为融资交易者的决策依据,因而开通融资融券对管理者避税行为的抑制主要来自卖空威胁.最后,作为避税活动减少的后果,本文发现标的公司的信息不透明程度显著降低.     

Pay-based Screening Mechanism: Personnel Selection in the View of Economics Theory

Based on economic theories, the paper studies the personnel selection at the asymmetric job market using signaling and screening model. The authors hold the opinion that an organization can screen the candidates' signaling based on the self-selection principle by providing an appropriate compensation choice. A pay-based screening mechanism is proposed to help the organization drive away the nonqualified applicants and retain the excellent applicants.     

建成环境对居民出行碳排放的影响研究进展

建成环境对居民出行碳排放的影响密切.归纳了居民出行行为理论的发展框架及其理论基础,梳理了建成环境的测度指标及其对居民家庭车辆保有量和出行碳排放的影响关系,并总结两者影响关系的自选择效应.现有研究发现,建成环境测度指标及其对居民出行碳排放的影响结论并不统一,考虑居住自选择的影响,需要进一步丰富相关实证研究.