Do highly productive researchers have significantly higher probability to produce top cited papers? Or does the increased productivity in science only result in a sea of irrelevant papers as a perverse effect of competition and the increased use of indicators for research evaluation and accountability focus? We use a Swedish author disambiguated dataset consisting of 48,000 researchers and thei...

We study an integrated quantity discount and vehicle routing problem where truck utilization is increased by building multi-stop routes and increasing order sizes through a purchase incentive. We model the problem and prove it to be NP-hard. Our experiments show that commercial solvers do not effectively solve instances with more than ten buyers. We propose the use of non-compromising route eli...

Editorials Cataract surgery—quantity and quality In this issue, we present the initial results from the second national survey of cataract surgery, which was a collabora-tive endeavour supported by the Department of Health, the Royal College of Ophthalmologists, the College of Optometrists, and the Royal College of Nursing. Great credit is due to the authors for what was clearly an enormous tas...

An experiment is described in which the speech rate of a short preceding or following context was manipulated in addition to that of a vowel or a consonant that carried a quantity distinction. The results showed the durations of these segments and the speech rate of their left and right context to be crucial for quantity perception.