نتایج جستجو برای: human labor

تعداد نتایج: 1703804  

2007
James Heintz

Using estimates of earnings functions in Ghana, this paper examines patterns of labor market segmentation with regard to formal and informal employment. Persistent earnings differentials are used as indicators of limited mobility across segments of the employed labor force. We find evidence of labor market segmentation between formal and informal employment and between different categories of i...

Journal: :The Journal of clinical investigation 1999
Y L Dong L Fang S Kondapaka P R Gangula S J Wimalawansa C Yallampalli

Calcitonin gene-related peptide (CGRP) is a potent vasodilator and relaxes smooth muscle of a variety of tissues, but the effects of CGRP on human myometrial contractions and the changes in CGRP receptors (CGRP-Rs) in human myometrium have not been described. We report that CGRP induced dose-dependent relaxation in spontaneously contracting myometrium from pregnant women. This relaxation effect...

2009
James J. Heckman Bas Jacobs

Policies to Create and Destroy Human Capital in Europe Trends in skill bias and greater turbulence in modern labor markets put wages and employment prospects of unskilled workers under pressure. Weak incentives to utilize and maintain skills over the life-cycle become manifest with the ageing of the population. Reinvention of human capital policies is required to avoid increasing welfare state ...

Journal: :The Journal of clinical investigation 1997
R K Bansal P C Goldsmith Y He C J Zaloudek J L Ecker R K Riemer

The mechanisms that maintain relative uterine quiescence during pregnancy remain largely unknown. A possible role for nitric oxide has recently emerged, however, the expression of nitric oxide synthase within human myometrium at midgestation, a time when the uterus is normally quiescent, has not been investigated. The purpose of this study was to identify cell types in human myometrium that con...

Journal: :Current Biology 2016
Shane J. Macfarlan

Biological market forces shape patterns of cooperation typical of small-scale human societies that are organized by division of labor based on age and gender. Labor specialization promotes trade, while supply and demand affect the amount individuals exchange for commodities.

2016
Jon Lartey Julie Taggart Stephen Robson Michael Taggart

BACKGROUND Myosin light-chain phosphatase is a trimeric protein that hydrolyses phosphorylated myosin II light chains (MYLII) to cause relaxation in smooth muscle cells including those of the uterus. A major component of the phosphatase is the myosin targeting subunit (MYPT), which directs a catalytic subunit to dephosphorylate MYLII. There are 5 main MYPT family members (MYPT1 (PPP1R12A), MYPT...

Journal: :Journal of reproductive immunology 2010
Aurelija Dubicke Emma Fransson Gabriele Centini Eva Andersson Birgitta Byström Anders Malmström Felice Petraglia Eva Sverremark-Ekström Gunvor Ekman-Ordeberg

Cervical ripening is necessary for successful delivery. Since cytokines are believed to be involved in this process, the aim of this study was to investigate possible changes in the mRNA and protein expression of pro-inflammatory cytokines (interleukin (IL)-1alpha, IL-1beta, IL-12, IL-18) and anti-inflammatory cytokines (IL-4, IL-10, IL-13) in the human cervix during pregnancy, term and preterm...

Journal: :The American economic review 2012
Joshua Graff Zivin Matthew Neidell

As one of the primary factors of production, labor is an essential element in every nation’s economy. Investing in human capital is widely viewed as a key to sustaining increases in labor productivity and economic growth. While health is increasingly seen as an important part of human capital, environmental protection, which typically promotes health, has not been viewed through this lens. Inde...

2007
Eric A. Hanushek ERIC A. HANUSHEK

There are three distinct research traditions in the analysis of individual earnings determination: human capital, or earnings function, analyses; aggregate wage analyses; and labor demand analyses. An important and incongruous aspect of each is the treatment of geographical differences in labor markets. This paper first investigates the magnitude and character of geographical wage differentials...

Journal: :تحقیقات اقتصادی 0
زهرا دهقان شبانی استادیار بخش اقتصاد دانشگاه شیراز روح اله شهنازی استادیار بخش اقتصاد دانشگاه شیراز

human capital has important role on economic growth. this factor can increase labor and capital productivity. it can increase capacity of new technology and reduce criminal participation and improve voters’ political behavior and migration of people with high human capital to another region has effects on region and spatial spillover on other regions. the present study aimed to analyze the dire...

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