We use generalized method of moments to estimate a rational expectations aggregate demand/aggregate supply macroeconomic model for the US economy. Variants of the model have been extensively used in analyses of optimal monetary policy under rational expectations. Our aim is to examine whether supply or demand shocks have predominated in the postwar era, and whether shocks of either type have be...

PURPOSE:To determine the indication for and incidence and evolution of temporary and permanent pacemaker implantation in cardiac transplant recipients. METHODS: A retrospective review of 114 patients who underwent orthotopic heart transplantation InCor (Heart Institute USP BR) between March 1985 and May 1993. We studied the incidence of and indication for temporary pacing, the relationship betw...

PURPOSE The use of temporary or permanent cements in fixed implant-supported prostheses is under discussion. The objective was to compare the retentiveness of one temporary and two permanent cements after cyclic compressive loading. MATERIALS AND METHODS The working model was five solid abutments screwed to five implant analogs. Thirty Cr-Ni alloy copings were randomized and cemented to the a...

Humans strive for some kind of happiness in a world that is not conducive to it. As each human life is a collection of random thoughts, choices, experiences, memories, and their interpretations, a permanent state of vague happiness does not exist, since everything is temporary. The pursuit of happiness, or the pursuit of anything in life, does not lead to a permanent state or thing. One can onl...

BACKGROUND Animal models are essential to study the pathophysiological changes associated with focal occlusive stroke and to investigate novel therapies. Currently used rodent models have yielded little clinical success, however large animal models may provide a more suitable alternative to improve clinical translation. We sought to develop a model of acute proximal middle cerebral artery (MCA)...

The relations between survivors and disability and between the survivors' and disabled people's movements are complex and there is little agreement about them. For example, there was only one mention of survivors in Jane Campbell and Mike Oliver's major examination of disability politics and the only organisation referred to is an organisation for mental health service users (Campbell and Olive...

A unique feature of migration in China is its two-track system, one consisting of permanent migration and temporary migration. This article examines whether and how hukou reforms and the maturation of migration streams since the 1980s have changed the two-track system. Using data on interprovincial migration from the 1990 and 2000 censuses, our empirical analysis focuses on the differentials be...