The production of ferret visual cortical neurons was studied using 3H-thymidine autoradiography. The genesis of cortical neurons begins on or slightly before embryonic day 20 (E20) of the 41 d gestational period, continues postnatally until 2 weeks after birth (P14), and follows an inside-out radial gradient with neurons for the deeper cortical layers being generated before those for the superf...

In this paper we consider the implications of habits for optimal monetary policy, when those habits either exist at the level of the aggregate basket of consumption goods (‘super…cial’habits) or at the level of individual goods (‘deep’habits: see Ravn, Schmitt-Grohe, and Uribe (2006)). External habits generate an additional distortion in the economy and create new trade-o¤s for optimal policy, ...

Business cycles are substantially correlated across countries. Yet, most existing models are not able to generate substantial transmission through international trade. We show that the nature of such transmission depends fundamentally on the features determining the responsiveness of labor supply and labor demand to international relative prices. We augment a standard international macroeconomi...

New Keynesian models with unemployment and incomplete markets are rapidly becoming a new workhorse model in macroeconomics. Such models typically require heavy computational methods which may obscure intuition and overlook equilibria. We present a tractable version which can be characterized analytically. Our results highlight that –due the interaction between incomplete markets, sticky prices ...

We present a model of flight to quality episodes that emphasizes systemic risk and the Knightian uncertainty surrounding these episodes. Agents make risk management decisions with incomplete knowledge. They understand their own shocks, but are uncertain of how correlated their shocks are with systemwide shocks. Aversion to this uncertainty leads them to question whether their private risk manag...

The timing and spatial distribution of cells containing FMRFamide- and 5-HT-related molecules in the embryonic development of the mollusc Viviparus ater are examined using immunohistochemistry. FMRFamide-like molecules emerge in the early stage E8 (8% of embryonic development) before the 5-HT immunoreactivity, and they are not only found during nervous system ontogeny. As the parts of the diges...

We present a model of optimal intervention in a flight to quality episode. The reason for intervention stems from a collective bias in agents' expectations. Agents in the model make risk management decisions with incomplete knowledge. They understand their own shocks, but are uncertain of how correlated their shocks are with systemwide shocks, treating the latter uncertainty as Knightian. We sh...

Nowadays thyroid gland disorder is very common disease. More than one third of all women may be found to have at least one thyroid nodule disorder during their lifetime. Thyroid detection test is usually done by invasive and noninvasive methods. Invasive methods are traumatic methods and non-invasive methods like ultrasound and x-rays should not be used many time. Thyroid function tests (TFTs) ...

Express roads are a potential source of heavy metal contamination in the surrounding environment. The Warsaw Expressway (E30) is one of the busiest roads in the capital of Poland and cuts through the ecologically valuable area (Mazowiecki Natural Landscape Park). Soil samples were collected at distances of 0.5, 4.5 and 25 m from the expressway. The concentrations of cadmium (Cd), copper (Cu), n...

BACKGROUND Neonatal enterovirus (EV) infections lead to a wide range of clinical manifestations, from mild febrile illness to severe, sometimes fatal, sepsislike disease. METHODS To determine the relationship of EV serotypes with the risk of neonatal infection and its fatal outcome, we analyzed data reported to the National Enterovirus Surveillance System (NESS) during 1983-2003. RESULTS Of...