M. Pilar Valverde Ibañez

Learn More
Annotating a corpus with error information is a challenging task. This paper describes the design, evaluation and refinement of an annotation scheme for Spanish article errors in learner data, so that future work on corpus annotation and automatic article error detection can progress. To evaluate reliability, 300 noun phrases with definite, indefinite and(More)
We study behavior in a search experiment where sellers receive randomized bids from a computer. At any time, sellers can accept the highest standing bid or ask for another bid at positive costs. We find that sellers stop searching earlier than theoretically optimal. Inducing a mild form of time pressure strengthens this finding in the early periods. There(More)
We study behavior in a search experiment where sellers receive randomized bids for a fictitious good from a computer. At any time, sellers can accept the highest standing bid or ask for another bid at positive costs. We find that sellers stop searching earlier than theoretically optimal. Inducing a mild form of time pressure strengthens this finding at(More)
OBJECTIVES To know the percentage of patients with nonrheumatic atrial fibrillation treated with anticoagulants as an approach to the effectiveness of the prophylactic treatment of stroke. DESIGN Multicenter observational study. SETTING Six primary health centers from Barcelona. PARTICIPANTS 465 patients with the diagnosed of AF were selected during(More)
Spanish is a quite flexible constituent order language. However, the order in which functions appear is not arbitrary but is due to several factors, some of them formally detectable. This paper presents a proposal of description of the order of clause-level constituents in Spanish, based in corpus and aimed at the desambiguation of syntactic trees.
According to advocates, eco-certification can improve developing country farmers’ environmental and economic performance. However, these notional benefits can be undercut by selfselection: the tendency of relatively wealthy farmers already meeting eco-certification standards to disproportionately participate. Empirical evidence on this matter is scarce.(More)
Methods Data on End-of-Life Care of critically ill patients admitted to 11 catalonian ICUs was prospectively collected before (P1: 01/3-31/06 2013) and after (P2: 01/230/05) an on-line training educational program on LSTL and cDCD delivered to 58 nurses and 62 doctors of the participating centres. Potential for cDCD was assessed through the analysis of(More)
The intense debate on the effectiveness of the war on drugs contrasts with the lack of empirical evidence on its impacts. To evaluate the effectiveness of control-supply policies, we use micro data from an original survey with farmers living in a coca growing area in Colombia. We find that while eradication and alternative development decrease coca supply,(More)