This paper studies opportunistic behaviour in a model of decentralized economic exchange and inadequate institutional framework of formal contract enforcement. It is shown that (i) when the number of cheating traders is sufficiently large, inadequate institutions (e.g. due to insufficient legal provisions and/or ineffective enforcement of existing laws) result in a loss of decentralized trading...

during a 30-month period. 2s patients with deep infected median sternotomy wounds were managed surgically. fifteen patients had chronic sternal osteomyelitis with associated costochondruis, 7 patients had only costochondritis, and 3 patients had dehiscence and/or mediastinitis. twenty were male and 5 were female their ages rangedfrom 11 to 71 years. nine patients had 11 failed previous attempts...

There is widespread concern that the number of children living in "child-headed households" is rapidly increasing as a result of AIDS-related adult mortality in much of sub-Saharan Africa. Based on analyses of data from several representative national surveys over the period 2000-2007, this paper examines the extent to which this is the case in South Africa. It explores trends in the number of ...

BACKGROUND Spinal anaesthesia (SA) has high success rates. However, inadequate block after SA has been reported even in the absence of technical problems. Various mechanisms for failed SA (FSA) have been proposed, but reports of cerebrospinal fluid (CSF) concentrations of local anaesthetics (LA) after FSA are scarce. We report lumbar CSF concentrations of bupivacaine in 20 patients in whom adeq...

AIM To complete an audit of bone marrow trephine biopsy adequacy in children MATERIAL 605 specimens from children with neuroblastoma submitted by 25 centres were reviewed centrally. This reassessment ran between January 1995 and August 1998. RESULTS 25% of specimens (95% confidence interval (CI) 21% to 29%) were inadequate compared with 17% (95% CI 14% to 20%) in a previous study. Variation...

BACKGROUND We conducted this study to determine the erythrocyte glucose-6-phosphate dehydrogenase (G6PD) activity level in patients with end-stage renal disease (ESRD) on maintenance hemodialysis (HD) and to determine the effect of hemodialysis adequacy on G6PD activity levels and its impact on anemia. METHODS Eighty-two patients (48 men and 34 women) receiving regular hemodialysis for ESRD t...

this study investigated how english as foreign language (efl) learners with different learning styles (field dependent and field independent) boost up their reading comprehension abilities as they develop their metacognitive skills. to conduct this research, 60 participants were randomly invited to sit pet (preliminary english test) to ensure homogeneity of the participants in terms of language...

objectives: specific language impaired children, despite being normal in cognitive and neurological characteristics, and also normal levels of hearing, experience multiple problems in syntax comprehension. this study compared the passive comprehension as one of syntactic structures in persian-speaking typically developing children and specific language impaired children. methods: 10 children wi...

Laparoscopic hernioplasty is a technique which can present a number of specific complications. This paper reviews the complications that can occur during laparoscopic hernia repair and ways to avoid them; it also describes the surgical technique used successfully in over 1000 cases. Initial experience suggests that complications can be avoided with adequate knowledge, attention to surgical anat...

non-communicable disease continues to be an important public health problem in india, being responsible for a major proportion of mortality and morbidity. demographic changes, changes in the lifestyle along with increased rates of urbanization are the major reasons responsible for the tilt towards the non-communicable diseases. in india, there is no regular system for collecting data on non-com...