This chapter provides a roadmap to the burgeoning literature on two-sided markets with a speci…c focus on BtoB marketplaces. Online intermediation involves two-sided network e¤ects between buyers and sellers, and the implications for optimal BtoB platforms’tari¤s are discussed. The chapter discusses …rst the monopoly case, drawing attention to the distinction between upfront registration fees a...

Two experiments tested the roles of hidden toys and motor history in the AB task with l&monthold infants. In Experiment 1 (N = 24), infants were tested in lid and toy versions of the task, each comprised of A and B trials. No toys were ever hidden in the lid condition. On all A trials, an experimenter directed infants’ attention to one of two lids (the A lid) and allowed infants to reach follow...

BACKGROUND Low iodine diet (LID) is recommended in patients with differentiated thyroid cancer before radioiodine administration. Patients with increased thyroglobulin (Tg) level, but negative (131)I whole body scan present diagnostic and therapeutic dilemma. This study was designed to evaluate the benefit of a two-week LID in patients with elevated serum Tg levels and negative (131)I whole bod...

We report a case of right-sided iatrogenic Horner's syndrome developed after surgical treatment for pulmonary hydatid cyst. This occurred in a 10 year old girl who had been diagnosed as having a ruptured lung hydatid cyst on the basis of clinical, radiological, serological, histopathological and perioperative findings. The patient underwent right thoracotomy and the cystotomy-capitonnage for th...