The modern web critically depends on aggregation of information from self-interested agents, for example opinion polls, product ratings, or crowdsourcing. We consider a setting where multiple objects (questions, products, tasks) are evaluated by a group of agents. We first construct a minimal peer prediction mechanism that elicits honest evaluations from a homogeneous population of agents with ...

This article describes the work carried out over the database of questions belonging to the different opinion polls carried out over the last 50 years in Spain. Approximately half of the questions are provided with a title while the other half is untitled. It is described the work and techniques implemented in order to automatically generate the titles for the corpus of untitled questions. The ...

I consider a two-candidate plurality-rule election in which there is aggregate uncertainty about the popularity of each candidate, where voting is costly, and where participants are instrumentally motivated. The unique equilibrium predicts significant turnout under reasonable parameter configurations, and greater turnout for the underdog offsets the expected advantage of the perceived leader. I...

INTRODUCTION Our aim was to assess the visibility and efficiency of graphic health warnings (GHWs) on waterpipe tobacco packs (WTPs) and to explore other more effective places to display them for better impact. We also evaluated the visibility of GHWs when placed on the waterpipe device. METHODS We conducted 3 cross-sectional study phases using face-to-face survey questionnaires in 2014-2015. P...

BACKGROUND/AIMS Systemic thrombolysis for acute ischaemic stroke is the standard of care in the UK. In the absence of trial data on the safety and efficacy of this treatment in patients with end-stage renal disease, we captured the views of UK nephrologists to highlight health care policy and research objectives. METHODS Consultant nephrologists participated in an internet-based questionnaire...

Opinion mining (OM) is a recent subdiscipline at the crossroads of information retrieval and computational linguistics which is concerned not with the topic a document is about, but with the opinions it expresses. OM has a rich set of applications, ranging from tracking users’ opinions about products or about political candidates as expressed in online forums, to customer relationship managemen...

cardiac surgery at Bristol University, tried to get complex heart surgery on children at Bristol stopped because “we were no good at this kind of surgery,” he told the inquiry into Bristol paediatric cardiac surgery services last week. It had been “a mistake” on his part not to have passed on to the cardiac team at Bristol an offer from Great Ormond Street Hospital in London to do the more comp...