Space-times produced by a time-dependent scalar field

Models of Lorentz/diffeomorphism violation frequently make use of a time-dependent scalar field. We investigate space-times produced by such a field.Comment: Presented at PASCOS Meeting 200

Regulating Sperm Donation: Why Requiring Exposed Donation Is Not the Answer

[...] the risk of incest and consanguinity11 are prevalent with anonymous donation12 since there is no monitoring of the number of live births per donor. [...] the number of children born from sperm donation has doubled in recent years.30 Although sperm may be donated by a relative or close friend of the couple or individual, often the sperm is donated anonymously through a sperm bank or clinic

Relational Incentives in Chinese Family Firms

This paper mainly discusses the choice of managerial compensation contracts in Chinese family firms. Relation or guanxi in Chinese language is an important factor that should be considered because it can bring the shirking cost to the relation-based manager and the caring cost to the owner under Chinese-style differential mode of association (“chaxu geju”). Our theoretical analysis shows that under some conditions it is optimal for the owner to choose the efficiency wage contract, and that under other conditions it is optimal for the owner to choose the share-based incentive contract.Managerial compensation, Efficiency wage contract, Share-based incentive contract, Relation (Guanxi), Chinese family firm.