Learn More
Two algorithms for booking courses of radiotherapy treatment sessions for the dynamic arrival of patients in a parallel machine environment are developed. Patients vary by due date, by which they should start their treatments, clinical category and treatment machine requirement. The first algorithm, mimicking current practice, books patients forward from(More)
We employ a novel approach to identify overbidding in the field. We compare auction prices to fixed prices for the same item on the same webpage. In detailed board-game data, 42 percent of auctions exceed the simultaneous fixed price. The result replicates in a broad cross-section of auctions (48 percent). A small fraction of overbidders, 17 percent, suces(More)
OBJECTIVE To determine whether increasing calcium intake from dietary sources affects bone mineral density (BMD) and, if so, whether the effects are similar to those of calcium supplements. DESIGN Random effects meta-analysis of randomised controlled trials. DATA SOURCES Ovid Medline, Embase, Pubmed, and references from relevant systematic reviews.(More)
In this paper, we propose an efficient approach to maintaining data consistency of broadcast data in mobile computing environments. At the server a special read-only transaction, the broadcast transaction, is scheduled to read data entities from the database for broadcasting data. Obviously, traditional concurrency control algorithms are inadequate and(More)
OBJECTIVE To examine the evidence underpinning recommendations to increase calcium intake through dietary sources or calcium supplements to prevent fractures. DESIGN Systematic review of randomised controlled trials and observational studies of calcium intake with fracture as an endpoint. Results from trials were pooled with random effects meta-analyses.(More)
BACKGROUND The anti-human epidermal growth factor receptor 2 (HER2) monoclonal antibody trastuzumab improves outcomes in patients with node-positive HER2+ early breast cancer. Given trastuzumab's high cost, we aimed to estimate its cost-effectiveness by heterogeneity in age and estrogen receptor (ER) and progesterone receptor (PR) status, which has(More)
BACKGROUND In the Fit2Quit randomised controlled trial, insufficiently-active adult cigarette smokers who contacted Quitline for support to quit smoking were randomised to usual Quitline support or to also receive ≤10 face-to-face and telephone exercise-support sessions delivered by trained exercise facilitators over the 24-week trial. This paper aims to(More)
How does job security influence productivity? I create a dataset from the bibliographic records of the National Bureau of Economic Research working paper series and from hand collected data from individual curricula vitae to compare productivity of professors before and after tenure. This paper uses a fuzzy regression discontinuity design with fixed effects(More)
  • 1