This paper analyzes gender issues with respect to public pensions in China. Because provision of public pensions in China is highly fragmented, with different programs applying to different groups of people, we focus on the largest mandatory public pension program in urban China, the Urban Employees’ Pension Program. The paper uses data from the China Health and Retirement Longitudinal Study (C...

Given a primal-dual pair of linear programs, it is well known that if their optimal values are viewed as lying on the extended real line, then the duality gap is zero, unless both problems are infeasible, in which case the optimal values are +∞ and −∞. In contrast, for optimization problems over nonpolyhedral convex cones, a nonzero duality gap can exist when either the primal or the dual is fe...

Intercellular calcium waves can be observed in adult tissues, but whether they are instructive, permissive, or even required for behavior is predominantly unknown. In the nematode Caenorhabditis elegans, a periodic calcium spike in a pacemaker cell initiates a calcium wave in the intestine. The calcium wave is followed by three muscle contractions that comprise the defecation motor program. Nor...

We describe the Gems of Galaxy Zoos (Zoo Gems) project, a gap-filler project using short windows in Hubble Space Telescope's schedule. As with previous snapshot programs, targets are taken from pool based on position; we combine objects selected by volunteers both Zoo and Radio citizen-science projects. uses exposures Advanced Camera for Surveys (ACS) to address broad range topics galaxy morpho...