Bases, Bullets, and Ballots: The Effect of U.S. Military Aid on Political Conflict in Colombia

Does foreign military assistance strengthen or further weaken fragile states facing internal confict? We address this question by estimating how U.S. military aid affects violence and electoral participation in Colombia. We exploit the allocation of U.S. military aid to Colombian military bases, and compare how aid affects municipalities with and without bases. Using detailed political violence data, we find that U.S. military aid leads to differential increases in attacks by paramilitaries (who collude with the military), but has no effect on guerilla attacks. Aid increases also result in more paramilitary (but not guerrilla) homicides during election years. Moreover, when military aid rises, voter turnout falls more in base municipalities, especially those that are politically contested. Our results are robust to an instrument based on worldwide increases in U.S. military aid (excluding Latin America). The findings suggest that foreign military assistance may strengthen armed non-state actors, undermining domestic political institutions.military aid; conflict; democracy; elections

Vibration Analysis of Heterogeneous Gearbox Faults using EMD Features and SVM Classifier

Gearbox is one of the important mechanical power transmission device most commonly used in automobiles and industries to get the desired change in speed and torque. The gearbox fault diagnosis has given utmost importance for its significance in preventing halts of a mechanical system and guaranteeing an advantage of sufficient maintenance. This paper presents the vibration analysis of heterogeneous gearbox faults using EMD features and SVM classifier. The vibration signal is converted into intrinsic mode functions (IMF) with decreasing order of frequencies using empirical mode decomposition (EMD) method. Feature vector consisting of information theoretic features have been computed for each IMF and concatenated to form a feature set. By using random permutations, the feature set has been divided into training and testing sets. The support vector machine (SVM) algorithm has been used as a classification technique to diagnose the gearbox faults, which consists of five-class classification. The accuracy of the developed algorithm has been validated using 100 Monte Carlo runs. A comparative study has been carried between computed features and varying IMF components. The observations made were - clear discrimination of the gearbox faults and improved classification accuracy, which contain - chipped tooth, missing tooth, root fault, surface fault and healthy working state of the gear

Coercive Contract Enforcement: Law and the Labor Market in 19th Century Industrial Britain

British Master and Servant law made employee contract breach a criminal offense until 1875. We develop a contracting model generating equilibrium contract breach and prosecutions, then exploit exogenous changes in output prices to examine the effects of labor demand shocks on prosecutions. Positive shocks in the textile, iron, and coal industries increased prosecutions. Following the abolition of criminal sanctions, wages differentially rose in counties that had experienced more prosecutions, and wages responded more to labor demand shocks. Coercive contract enforcement was applied in industrial Britain; restricted mobility allowed workers to commit to risk-sharing contracts with lower, but less volatile, wages.

Optimization of thermostable alkaline protease production from species of Bacillus using rice bran

A protease producing microorganism was isolated from soil collected from a detergent industry and identified as Bacillus species. Isolate K-30 produced thermostable alkaline protease utilizing rice bran. The optimum conditions for protease activity was 55°C at pH 9 with 4% inoculum in the medium containing 1% rice bran after 96 h of incubation. Beef extract, tryptone and yeast extract were good nitrogen sources while lactose, starch, and sucrose were suitable for enzyme production. The extracellular production of the enzyme, its thermostable nature and compatibility with most commercial detergents are features which suggest its application in the detergent industry.African Journal of Biotechnology Vol. 4 (7), pp. 724-726, 200

Democracy, Redistribution and Inequality

In this paper we revisit the relationship between democracy, redistribution and inequality. We first explain the theoretical reasons why democracy is expected to increase redistribution and reduce inequality, and why this expectation may fail to be realized when democracy is captured by the richer segments of the population; when it caters to the preferences of the middle class; or when it opens up disequalizing opportunities to segments of the population previously excluded from such activities, thus exacerbating inequality among a large part of the population. We then survey the existing empirical literature, which is both voluminous and full of contradictory results. We provide new and systematic reduced-form evidence on the dynamic impact of democracy on various outcomes. Our findings indicate that there is a significant and robust effect of democracy on tax revenues as a fraction of GDP, but no robust impact on inequality. We also find that democracy is associated with an increase in secondary schooling and a more rapid structural transformation. Finally, we provide some evidence suggesting that inequality tends to increase after democratization when the economy has already undergone significant structural transformation, when land inequality is high, and when the gap between the middle class and the poor is small. All of these are broadly consistent with a view that is different from the traditional median voter model of democratic redistribution: democracy does not lead to a uniform decline in post-tax inequality, but can result in changes in fiscal redistribution and economic structure that have ambiguous effects on inequality.∗Prepared for the Handbook of Income Distribution edited by Anthony Atkinson and François Bourguignon. We are grateful to the editors for their detailed comments on an earlier draft and to participants in the Handbook conference in Paris, particularly to our discussant José-Víctor Ríos-Rull

Labor market institutions in the gilded age of American economic history

This chapter argues that although nineteenth-century labor markets were unencumbered by regulatory legislation, there existed frictions and rents in the labor market; moreover, labor market institutions other than legislation played an active role in determining labor market outcomes. The chapter provides evidence of frictions and firm-specific rents in nineteenth-century urban American labor markets: when firms experienced positive output price shocks, their employees earned wage premia relative to other employees with similar skills in the same labor market. The existence of rents in the labor contract suggests a role for bargaining and conflict between employees and employers. Workers in the late nineteenth century went on strike to increase wages. This chapter presents data on the frequency of strikes in the nineteenth century and suggestive evidence of an association between strikes and wages; finally, it documents the rise of judicial labor injunctions aimed at suppressing strikes

Coercive contract enforcement: law and the labor market in nineteenth century industrial Britain

British Master and Servant law made employee contract breach a criminal offense until 1875. We develop a contracting model generating equilibrium contract breach and prosecutions, then exploit exogenous changes in output prices to examine the effects of labor demand shocks on prosecutions. Positive shocks in the textile, iron, and coal industries increased prosecutions. Following the abolition of criminal sanctions, wages differentially rose in counties that had experienced more prosecutions, and wages responded more to labor demand shocks. Coercive contract enforcement was applied in industrial Britain; restricted mobility allowed workers to commit to risk-sharing contracts with lower, but less volatile, wages

Comparative study of effectiveness of computer based knowledge in teaching versus conventional teaching perception in pharmacology among second year MBBS undergraduate medical students at Maharajah’s Institute of Medical Sciences, Andhra Pradesh, India

Background: Medical education has been asserted as one of the most challenging, demanding, and stressful fields of study, as medical students are expected to acquire diverse competencies such as academic, clinical, and interpersonal skills. Pharmacology is rapidly evolving and expanding conquering many diseases in its stride. The survey-based study we aim to grasp the MBBS students’ opinion regarding the teaching practices in pharmacology. Aim was to Study and compare the Effectiveness of Computer Based Teaching Versus Conventional Teaching Perception About Pharmacology Among Second Year MBBS Undergraduate Medical Students.Methods: A comparative study was conducted at Department of Pharmacology, Maharajah’s Institute of Medical Sciences, Nellimarla, Vizianagaram, Andhrapradesh. Two hundred second year MBBS medical students (n = 200) were divided into two groups.Results: In this study results shows P value and statistical significance the two-tailed P value is less than 0.0001 by conventional criteria, this difference is considered to be extremely statistically significant. Confidence interval the mean of Pre-test score minus Post test score equals -3.1900 and 95% confidence interval of this difference from -3.4503 to -2.9297.Conclusions: The importance of pharmacology in clinical decision making is well understood by the majority of students and they aim to act in that behest. Also, we find that computer based learning is a new and important tool coming up in the arsenal of the pharmacology teacher