The Road Not Taken - What Is The “Appropriate” Path to Development When Growth is Unbalanced?

This paper develops a model that endogenizes both directed technologies and demography. Potential innovators decide which technologies to develop after considering available factors of production, and individuals decide the quality and quantity of their children after considering available technologies. This interaction allows us to evaluate potentially divergent development paths. We nd that exogenous unskilled-labor biased technological growth can induce higher fertility and lower education, inhibiting overall growth in per person income. However, if technical progress is locally endogenous, increases in the overall workforce caused by unskilled intensive technological progress can make R&D more protable; this can actually induce more income growth can the alternative, skill-intensive path.

An Exceptionally Simple Theory of Industrialization

Historically, industrialization has been associated with falling relative returns to skills. This fact is at odds with most theories of industrialization, which tend to imply rising skill premia as natural concomitants to economic growth. This paper develops a very simple model of historical growth to help solve this puzzle. Assuming that human capital is both a consumption good and an investment good, the model demonstrates how rising education levels, non-monotonic fertility rates, and falling skill premia can all be explained within one theory.

Human Capital and Technological Transition – Insights from the U.S.Navy

This paper explores the eects of human capital on workers during the latter 19th century by examining the specic case of the U.S. Navy. During this time, naval ocers belonged either to a regular or an engineer corps and had tasks assigned for their specialized training and experience. To test the eects of specialized skills on career performance, we compile educational data from original-source Naval Academy records for the graduating classes of 1858 to 1905. We merge these with career data extracted from ocial Navy registers for the years 1859 to 1907. This compilation comprises one of the longest and earliest longitudinal records of labor market earnings, education and experience of which we are aware. Our results suggest that wage premia for \engineer-skilled" ocers rapidly deteriorated over their careers; more traditionally skilled ocers were better compensated and promoted more frequently as their careers progressed. This compelled those with engineering skills to leave the service early, contributing to the Navy's failure to keep up with the technological frontier of the time.

The Appropriate Technology Frontier - Lessons for the Developing World

This paper presents a model of a developing economy that endogenizes both technological biases and demographic trends. As knowledge diffuses from foreign R&D-producing regions, potential innovators decide which technologies to develop after considering available factors of production, and individuals decide the quality and quantity of their children after considering available technologies. This interaction creates multiple growth paths- some economies develop labor-intensive techniques and expand the pool of unskilled labor; others grow into societies of highly skilled individuals and expanding outputs per capita. I find that if developing countries wish to achieve good prospects for income convergence, they should promote the flow of knowledge from the most developed regions, even if this results initially in a technology-skill mismatch. Such knowledge flows are more likely to promote the twin growths in human capital and technologies characteristic of the biggest economic success stories.

HAPS Gateway Link in the 5850-7075 MHz and Coexistence with Fixed Satellite Service

Gateway link is essential to connect HAPS platform to terrestrial based networks. This crucial link is incorporated in HAPS fixed service spectrum allocation in considerably high frequencies, renders the link for more attenuations by atmospheric gases, and rain effects, especially when the regional climate is not favorable. However, under the agenda item 1.20 of World Radio Conference-2012 (WRC-12) new HAPS allocation in the 5850-7075 MHz band is proposed. Although, spectrum features are incomparably reliable, on the contrary, Fixed Satellite Service (FSS) uplink transmissions will have signal levels much higher than those in HAPS systems and have the potential for causing interference at the HAPS gateway receiver. In this article a key aspect of co-channel interference phenomena is investigated to facilitate optimum frequency sharing in the band in question. By proposing mitigation techniques and statistical method this generic prediction model enhances the capability of the HAPS spectrum sharing and provides flexibility in spectrum planning for different fixed services

The Value of Human Capital during the Second Industrial Revolution—Evidence from the U.S. Navy

This paper explores the role of human capital on earnings and other measures of job performance during the late 19th century. During this time, U.S. Naval ocers belonged either to a regular or an engineer corps and had tasks assigned to their specialized training and experience. To test for the eects of specialized skills on performance, we compile educational data from original-source Naval Academy records for the graduating classes of 1858 to 1905. We merge these with career data extracted from official Navy registers for the years 1859 to 1907. This compilation comprises one of the longest and earliest longitudinal records of labor market earnings, education and experience of which we are aware. Our results suggest that greater technical skill translated into higher earnings early in careers, but wage premia diminished as careers progressed. From this evidence we argue that technical progress was more skill-depreciating than skill-biased during this period.

Naval Engineering and Labor Specialization during the Industrial Revolution

This paper explores the roles of capital- and technology-skill complementarities in labor allocation decisions within the U.S. Navy. During the latter 19th century the ocer corps was highly specialized, and was split between groups of line and sta ocers. This was also a time of dramatic technological changes which aected nearly every facet of naval opera- tions. Specically, naval technological developments tended to be \engineering-biased," in that they raised the relative importance of engineer-oriented skills. This created a dilemma for the Navy, as it navigated the balance between the benets of a specialized workforce implementing increasingly complex technologies with rising communication and coordina- tion costs. We rst document the extent of capital- and technology-skill complementarities within the navy which fostered greater labor specialization. We then show how the Navy vitiated the specialized human capital of ocers by blending the corps. The study oers in- sights into how an industry undergoing wrenching technological changes managed its labor and human capital allocation to help the U.S. become a world class naval power.

Movie Popularity Classification based on Inherent Movie Attributes using C4.5,PART and Correlation Coefficient

Abundance of movie data across the internet makes it an obvious candidate for machine learning and knowledge discovery. But most researches are directed towards bi-polar classification of movie or generation of a movie recommendation system based on reviews given by viewers on various internet sites. Classification of movie popularity based solely on attributes of a movie i.e. actor, actress, director rating, language, country and budget etc. has been less highlighted due to large number of attributes that are associated with each movie and their differences in dimensions. In this paper, we propose classification scheme of pre-release movie popularity based on inherent attributes using C4.5 and PART classifier algorithm and define the relation between attributes of post release movies using correlation coefficient.Comment: 6 page

Gravitational Properties of the Proca Field

We study various properties of a Proca field coupled to gravity through minimal and quadrupole interactions, described by a two-parameter family of Lagrangians. St\"uckelberg decomposition of the effective theory spells out its model-dependent ultraviolet cutoff, parametrically larger than the Proca mass. We present pp-wave solutions that the model admits, consider linear fluctuations on such backgrounds, and thereby constrain the parameter space of the theory by requiring null-energy condition and the absence of negative time delays in high-energy scattering. We briefly discuss the positivity constraints$-$derived from unitarity and analyticity of scattering amplitudes$-$that become ineffective in this regard.Comment: 23 pages, revised positivity-bound analysis, references adde

Effect of diazinon 60 EC on Anabas testudineus, Channa punctatus and Barbodes gonionotus

Anabas testudineus, Channa punctatus and Barbodes gonionotus were exposed to 5.62, 6.25, 6.87, 7.50, 8.12 and 8.75 ppm; 1.13, 2.26, 3.39, 4.52, 5.65 and 6.78 ppm; and 2.00, 2.50, 3.00, 3.50, 4.00 and 4.50 ppm of Diazinon 60 EC, respectively. The median lethal concentration (LC50) values of Diazinon 60 EC on A. testudineus, C. punctatus and B. gonionotus were 6.55, 3.09 and 2.72 ppm for 96 hrs of exposure. The fish species showed several abnormal behaviors which included restlessness, arena movements, loss of equilibrium, increased opercular activities, strong spasm, paralysis and sudden quick movements during the exposure. For histopathological studies, A. testudineus, C. punctatus and B. gonionotus were exposed for 7 days to sublethal concentrations of 1.13 and 3.75 ppm; 1.13 and 2.26 ppm; and 1.13 and 2.26 ppm of Diazinon 60 EC, respectively. Hypertrophy, necrosis and pyknosis of hepatocytes, pyknosis and degenerative changes such as necrosis of tubular and haematopoietic cells of kidney were the major histopathological effects