This paper shows that polluters who underestimate environmental harm might invest excessively in promoting technological change in pollution control under environmental liability law. Neither strict liability nor negligence can prevent such a distortion. However, we define a second best due care standard under negligence that induces a welfare superior R&D equilibrium. If, on the other hand, po...

Settling an Old Debate In their article “Bantu expansion shows that habitat alters the route and pace of human dispersals,” Grollemund et al. (1) have accomplished more than just their stated intention: to identify the role of habitat in channeling the directions of the early Bantu farming settlement of the African equatorial rainforest. What is most important is that the authors essentially br...

background : skin cancer is the most common malignancy in the world. thus, the aim of this study was to determine the incidence trend of skin cancer in isfahan province, iran. methods: the present cross-sectional study was conducted using data registered during 2004-2008 in the disease management center and cancer registry system of the ministry of health and medical education. the trend of ski...

Introduction The child’s history reveals frequent faringitis accompanied by oral lesions (4-5 episodes/year), billatreal ankle joint swelling and weight loss. Behçet disease (BD) is characterized by a triple-symptom complex of recurrent oral aphthous ulcers, genital ulcers, and uveitis. Hippocrates may have described Behçet disease in the fifth century BC; however, the first description of the ...