The Asian miracle and modern growth theory

In the past 35 years, China, Hong Kong, Korea, Singapore, and Taiwan (China) have transformed themselves from technologically backwards and poor economies to relatively modern, affluent economies. Each has experienced more than a fourfold increase in per capita income. In each, a significant number of firms are producing technologically complex products competitive with firms in Europe, Japan, and the United States. Their growth performance has exceeded that of virtually all comparable economies. How they did it is a question of great importance. Virtually all theories about how they did it placed investments in capital stock at the center of the explanation. The authors divide most growth theories about the Asian miracle into two groups: 1) The"accumulation"theories stress the role of capital investments in moving these economies along their production functions. What lies behind rapid development, according to this type of theory, is very high investment rates. If a nation makes the investments, marshals the resources, development will follow. 2) The"assimilation"theories stress the entrepreneurship, innovation, and learning these economies went through before they could master the new technologies they were adopting from more advanced industrial nations. They see investment in human and physical capital as an essential but far from sufficient part of assimilation. In addition, people must learn about, take the risk of operating, and come to master technologies and other practices new to the country, if not the world. The emphasis for assimilation theorists is on innovation and learning, rather than on marshaling. If one marshals but does not innovate and learn, development does not follow. These are complex theories that raise as many questions as they answer. The authors discuss differences in the way the two groups of theorists treat four matters: entrepreneurial decisionmaking; the nature of technology; the economic capabilities possible with a well-educated work force; and the role exports play in a country's rapid development.The differences between the theories matter because they affect our understanding of why the Asian miracle happened and because they imply different things about appropriate economic development policy.General Technology,Environmental Economics&Policies,Labor Policies,International Terrorism&Counterterrorism,Economic Theory&Research,Economic Theory&Research,Environmental Economics&Policies,Economic Growth,General Technology,Inequality

Low Investment is Not the Constraint on African Development

While many analysts decry the lack of sufficient investment in Africa, we find no evidence that private and public investment are productive, either in Africa as a whole (unless Botswana is included in the sample), or in the manufacturing sector in Tanzania. In this restricted sense, inadequate investment is not the major obstacle to African economic development.African Development, private and public investment, economic development

Is investment in Africa too low or too high : macro and micro evidence

The authors investigate the relationship between weak growth performance and low investment rates in Africa. The cross-country evidence suggests no direct relationship. The positive and significant coefficient on private investment appears to be driven by Botswana's presence in the sample. Allowing for the endogeneity of private investment, controlling for policy, and positing a nonlinear relationship make no difference to the conclusion. Higher investment in Africa would not by itself produce faster GDP growth. Africa's low investment and growth rates seem to be symptoms of underlying factors. To investigate those factors and to correct for some of the problems with cross-country analysis, the authors undertook a case study of manufacturing investment in Tanzania. They tried to identify why output per worker declined while capital per worker increased. Some of the usual suspects--such as shifts from high- to low-productivity subsectors, the presence of state-owned enterprises, or poor polices--did not play a significant role in this decline. Instead, low capacity utilization (possibly the by-product of poor policies) and constraints on absorptive capacity for skill acquisition seem to be critical factors. If Tanzania is not atypical,the low productivity of investment in Africa was the result of a combination of factors that occurred simultaneously, not any single factor. What does this tell us? First, we should be more careful about calling for an investment boom so that Africa can resume growth. Unless some or all of the underlying problems are addressed, the results may be disappointing. We should also be more circumspect about Africa's low savings rate; it may be low because returns to investment were so low. The relatively high level of capital flight from Africa may have been a level rational response to the lack of investment oportunities at home. Second, there is probably no single key to unlocking investment and GDP growth in Africa. All of the factors contributing to low productivity should be addressed simultaneously.Economic Growth,Achieving Shared Growth,Environmental Economics&Policies,Trade and Regional Integration,Economic Theory&Research

Effects of untrained earmold impression taking on custom hearing protector device performance

Today\u27s consumer is increasingly turning to the internet for both healthcare information as well as the purchase of custom hearing protection devices (HPDs). These HPDs are often cast from do-it-yourself home ear impression kits that include a syringe and silicone earmold impression material to be injected into the ear canal. Although not required by law, earmold impressions have typically been taken by medical professionals and other individuals formally trained in the procedures and safety measures of effective earmold impression taking. The main purpose of this study was to determine if do-it-yourself earmold impressions produce HPD\u27s with lower attenuation levels than those HPD\u27s made from impressions taken by trained professionals. Custom HPDs cast from both amateur and professionally made impressions were evaluated by recording both real ear measurements and pure tone thresholds and compared for attenuation differences. The results showed that HPDs made from amateur made impressions showed significantly less attenuation than those made from professional made impressions. These results indicate that custom HPDs cast from amateur made impressions may not adequately provide adequate attenuation of noise leaving the wearer vulnerable to the damaging effects of noise

Few-Shot Bayesian Imitation Learning with Logical Program Policies

Humans can learn many novel tasks from a very small number (1--5) of demonstrations, in stark contrast to the data requirements of nearly tabula rasa deep learning methods. We propose an expressive class of policies, a strong but general prior, and a learning algorithm that, together, can learn interesting policies from very few examples. We represent policies as logical combinations of programs drawn from a domain-specific language (DSL), define a prior over policies with a probabilistic grammar, and derive an approximate Bayesian inference algorithm to learn policies from demonstrations. In experiments, we study five strategy games played on a 2D grid with one shared DSL. After a few demonstrations of each game, the inferred policies generalize to new game instances that differ substantially from the demonstrations. Our policy learning is 20--1,000x more data efficient than convolutional and fully convolutional policy learning and many orders of magnitude more computationally efficient than vanilla program induction. We argue that the proposed method is an apt choice for tasks that have scarce training data and feature significant, structured variation between task instances.Comment: AAAI 202

Corrections to the Born-oppenheimer Approximation, Part II

Adiabatic corrections to long-range Born- Oppenheimer potential

C-NNAP - A parallel processing architecture for binary neural networks

This paper describes the CNNAP machine, a MIMD implementation of an array of ADAM binary neural networks, primarily designed for image processing. CNNAP comprises an array of VME cards each containing a DSP, SCSI controller, and a new design of the SAT peripheral processor. The SAT processor is a dedicated hardware implemention that performs binary neural network computations. The SAT processor yields a potential speed-up of between 108 times to 182 times that of the current DSP with its dedicated coprocessor. CNNAP in association with the SAT provides a fast, parallel environment for performing binary neural network operations

The Cusp Conditions for Molecular Wave Functions

Cusp conditions to describe behavior of wave function at singularities of Coulomb potential corresponding to coalescence of two or more particles - diatomic molecule

Two-dimensional protein crystallization via metal-ion coordination by naturally occurring surface histidines

A powerful and potentially general approach to the targeting and crystallization of proteins on lipid interfaces through coordination of surface histidine residues to lipid-chelated divalent metal ions is presented. This approach, which should be applicable to the crystallization of a wide range of naturally occurring or engineered proteins, is illustrated here by the crystallization of streptavidin on a monolayer of an iminodiacetate-Cu(II) lipid spread at the air-water interface. This method allows control of the protein orientation at interfaces, which is significant for the facile production of highly ordered protein arrays and for electron density mapping in structural analysis of two-dimensional crystals. Binding of native streptavidin to the iminodiacetate-Cu lipids occurs via His-87, located on the protein surface near the biotin binding pocket. The two-dimensional streptavidin crystals show a previously undescribed microscopic shape that differs from that of crystals formed beneath biotinylated lipids

Phase I trial of procarbazine as a 5-day continuous infusion in children with central nervous system tumors.

Seven children with previously treated brain tumors were enrolled in a phase I trial of 5-day continuous-infusion procarbazine at 360, 480, and 638 mg/m2/day. Vitamin B6 levels were monitored. Myelosuppression was moderate though occasionally delayed, and nausea and vomiting were mild. At the highest dose level, a patient experienced severe psychosis that persisted for several weeks. From that dose-limiting toxicity and the degree of myelosuppression, the recommended dose for phase II trials in children is the same as for adults, 450 mg/m2/day