The first contribution of this paper is to use UK monthly firm-level data to show that there is a large amount of transitory volatility in firm-level average earnings from month to month. We conclude that this cannot all be explained away as the consequence of measurement error, composition effects or variation in remunerated hours i.e. we suggest this volatility is real. The second contributio...

The characteristic cycle of a complex of sheaves on a complex analytic space provides weak information about the complex; essentially, it yields the Euler characteristics of the hypercohomology of normal data to strata. We show how perverse cohomology actually allows one to extract the individual Betti numbers of the hypercohomology of normal data to strata, not merely the Euler characteristics...

Western hospitals of some size are characterized by a proliferation of nonintegrated information systems, resulting in considerable frustration both among users and information technology personnel. Consequently there have been many integration efforts. Such efforts typically include some or all of the four principle classes of hospital-based systems: electronic patient records, laboratory syst...

Social media has become synonymous with every day communication in our technologically advanced society. Individuals use it to share information, make plans with friends and keep up with folks geographically dispersed from them. Lesbian, gay, bisexual, and queer (LGBQ) individuals often use social media to find other individuals with whom they can share about their sexual orientation. In this s...

In this paper we provide sufficient conditions that ensure the convexity of the inverse images of an operator, monotone in some sense. Further, conditions that ensure the monotonicity, respectively the local injectivity of an operator are also obtained. Combining the conditions that provide the local injectivity, respectively the convexity of the inverse images of an operator, we are able to ob...