Some theoretical aspects of optimum redistribution

As its title suggests, the thesis considers various theoretical aspects of optimal government policy. The method is described in Chapter One: it is essentially that of `normative' public economics and provides the common theme of the remaining chapters. Chapters Two and Three are concerned with redistributive policy in general. Chapter Two discusses the use of observed information in redistributive policy. It derives the appropriate optimality conditions in simple models of redistribution, comparing the outcome with the existing theoretical literature and actual redistributive policy. Chapter Three considers quantities as redistributive tools, in contrast with the more usual concentration on incomes and prices. Chapter Four addresses the optimal taxation of wealth. To tax current wealth under optimal life-cycle saving may imply negative marginal tax rates at some point of the tax schedule, an outcome avoided when lifetime wealth is taxed directly. The principal theoretical obstacle to redistributing wealth is found to be the anticipation of tax implementation. Chapters Five and Six are both concerned with unemployment benefits. Chapter Five discusses them within the optimal policy framework. Attention is first concentrated on the optimal level of benefits and then on their optimal time pattern, in cases where they can vary with the duration of unemployment. Chapter Six digresses from the optimal policy format to discuss the macroeconomic role of unemployment benefits, arguing that the replacement ratio deserves a more explicit inclusion in the Keynesian income/expenditure analysis. Chapter Seven applies the optimal policy method to pension and retirement practices. The initial concern is whether or not formal pensions and retirement are theoretically justifiable as part of an optimal approach to policy. The discussion is then broadened to consider redistributive issues, within and between generations. Chapter Eight concludes

A developmental and genetic classification for malformations of cortical development: update 2012.

Malformations of cerebral cortical development include a wide range of developmental disorders that are common causes of neurodevelopmental delay and epilepsy. In addition, study of these disorders contributes greatly to the understanding of normal brain development and its perturbations. The rapid recent evolution of molecular biology, genetics and imaging has resulted in an explosive increase in our knowledge of cerebral cortex development and in the number and types of malformations of cortical development that have been reported. These advances continue to modify our perception of these malformations. This review addresses recent changes in our perception of these disorders and proposes a modified classification based upon updates in our knowledge of cerebral cortical development

Reinforcer magnitude and demand under fixed-ratio schedules with domestic hens

This study compared three methods of normalizing demand functions to allow comparison of demand for different commodities and examined how varying reinforcer magnitudes affected these analyses. Hens responded under fixed-ratio schedules in 40-min sessions with response requirement doubling each session and with 2-s, 8-s, and 12-s access to wheat. Over the smaller fixed ratios overall response rates generally increased and were higher the shorter the magazine duration. The logarithms of the number of reinforcers obtained (consumption) and the fixed ratio (price) were well fitted by curvilinear demand functions (Hursh et al., 1988. Journal of the Experimental Analysis of Behavior 50, 419–440) that were inelastic (b negative) over small fixed-ratios. The fixed ratio with maximal response rate (Pmax) increased, and the rate of change of elasticity (a) and initial consumption (L) decreased with increased magazine duration. Normalizing consumption using measures of preference for various magazine durations (3-s vs. 3-s, 2-s vs. 8-s, and 2-s vs. 12-s), obtained using concurrent schedules, gave useful results as it removed the differences in L. Normalizing consumption and price (Hursh and Winger, 1995. Journal of the Experimental Analysis of Behavior 64, 373–384) unified the data functions as intended by that analysis. The exponential function (Hursh and Silberberg, 2008. Psychological Review, 115, 186–198) gave an essential value that increased (i.e., α decreased significantly) as magazine duration decreased. This was not as predicted, since α should be constant over variations in magazine duration, but is similar to previous findings using a similar procedure with different food qualities (hens) and food quantities (rats)

The price of bank mergers in the 1990s

This article examines the primary motivations for the massive wave of bank mergers in the U.S. during the 1990s by analyzing the prices paid for target banks. The authors find that these prices reflect both general market and firm-specific characteristics. For example, the lifting of regulatory restrictions on geographic markets for bank mergers has a significant impact on the average price paid. Additionally, more profitable target banks tend to command a significantly higher market price.Bank mergers

Theory-based metrological traceability in education: A reading measurement network

Huge resources are invested in metrology and standards in the natural sciences, engineering, and across a wide range of commercial technologies. Significant positive returns of human, social, environmental, and economic value on these investments have been sustained for decades. Proven methods for calibrating test and survey instruments in linear units are readily available, as are data- and theory-based methods for equating those instruments to a shared unit. Using these methods, metrological traceability is obtained in a variety of commercially available elementary and secondary English and Spanish language reading education programs in the U.S., Canada, Mexico, and Australia. Given established historical patterns, widespread routine reproduction of predicted text-based and instructional effects expressed in a common language and shared frame of reference may lead to significant developments in theory and practice. Opportunities for systematic implementations of teacher-driven lean thinking and continuous quality improvement methods may be of particular interest and value

Picornavirus Subversion of the Autophagy Pathway

While autophagy has been shown to act as an anti-viral defense, the Picornaviridae avoid and, in many cases, subvert this pathway to promote their own replication. Evidence indicates that some picornaviruses hijack autophagy in order to induce autophagosome-like membrane structures for genomic RNA replication. Expression of picornavirus proteins can specifically induce the machinery of autophagy, although the mechanisms by which the viruses employ autophagy appear to differ. Many picornaviruses up-regulate autophagy in order to promote viral replication while some members of the family also inhibit degradation by autolysosomes. Here we explore the unusual relationship of this medically important family of viruses with a degradative mechanism of innate immunity

Lasing from a circular Bragg nanocavity with an ultra-small modal volume

We demonstrate single-mode lasing at telecommunication wavelengths from a circular nanocavity employing a radial Bragg reflector. Ultra-small modal volume and Sub milliwatt pump threshold level are observed for lasers with InGaAsP quantum well active membrane. The electromagnetic field is shown to be tightly confined within the 300nm central pillar of the cavity. The quality factors of the resonator modal fields are estimated to be on the order of a few thousands.Comment: 3 pages, 4 figures Submitted to AP

Deep ocean disposal of sewage sludge off Orange County, California: a research plan

Even though the discharge of sludge into the ocean via an outfall is not now permitted, this research plan has been prepared to show what could be learned with a full scale experimental sludge discharge of 150 dry tons/day by the County Sanitation Districts of Orange County into deep water (over 1000 feet). To provide a wide range of inputs and evaluation, a broad-based Research Planning Committee was established to advise the Environmental Quality Laboratory on the overall content and details of the research plan. Two meetings were held at EQL on: March 4-5, 1982: The entire Committee July 19-20, 1982: A working subgroup of the Committee The entire Committee is listed in Appendix B, with footnotes to indicate meeting attendance. Those unable to come to a meeting were asked to comment on the drafts by mail or telephone. We gratefully acknowledge the members of the Research Planning Committee for their generous help in formulating the research tasks and reviewing report drafts

Effect of Environmental and Ultraviolet Degradation on the Albedo of Polyethylene Sheet Materials for Improved Energy Harvesting by Bifacial Photovoltaic Power Plants

Solar energy farms typically utilize monofacial photovoltaic (mPV) cells in their arrays to capture direct sunlight to produce renewable energy. However, the efficiency of these farms can be increased by 2 – 6% through the implementation of bifacial photovoltaic cells (bPV). These bPV cells function by capturing incident ultraviolet (UV) light energy that is reflected off the surface to increase its overall energy production. The amount of UV energy that is reflected is dependent on the albedo value of surface, which is a measure of energy reflectance. In this study, samples of unreinforced polyethylene (PE), scrim-reinforced polyethylene (SR-PE), and woven polyethylene (W-PE) sheeting materials were tested to determine which had the highest albedo value as well as the most resistance to environmental degradation. Samples subjected to outdoor conditions were visited on a biweekly basis to measure their albedo values using an albedometer and to record any physical changes observed in the material. Samples were also placed in an accelerated weathering chamber in a laboratory which exposed the materials to continuous UV light in intervals of 20 hours. The results from testing determined that woven PE produced a 23% higher average albedo in comparison to the other candidate PE materials. Woven PE also demonstrated lower quantitative and qualitative environmental degradation. Based on these results, woven PE was concluded to be empirically superior as a ground albedo material among the materials tested in this study