The large influx of immigrants in recent decades has led to an equally long debate over their effect on the labor market outcomes of native-born workers. Economic theory posits that an increase in the supply of labor, such as from immigration, will reduce the wage employers are willing to pay all workers (native-born and foreign-born) in a given labor market. As a result, some of the workers wh...

background: according to the text book of obstetrics and gynecology, prematurity is the first cause of perinatal mortality. therefore postponing delivery will become mandatory to prevent complications of prematurity. parental mgso4 is one of the most common and the safest medications for this purpose. case report: we present a primigravida patient with multiple uterine myoma who had premature l...

We build a hybrid model of the aggregate labor market that features both standard labor supply forces and frictions in order to study the cyclical properties of gross worker flows across the three labor market states: employment, unemployment, and nonparticipation. Our goal is to assess the relative importance of frictions and labor supply in accounting for fluctuations in labor market outcomes...

The development of the production forces following Industrial Revolution radically dehumanized conditions labor. This situation brought about reactionary labor movements especially during period between end nineteenth century and beginning twentieth century. However, those reactions could not culminate in a class consciousness through which laborers organize to shatter foundations capitalism as...

In an equilibrium model of the labor market, workers and firms enter into dynamic contracts that can potentially last forever, but are subject to optimal terminations. Upon termination, the firm hires a new worker, and the worker who is terminated receives a termination contract from the firm and is then free to go back to the labor market to seek new employment opportunities and enter into new...

This paper was prepared for the Employment Conditions and Health Inequalities Knowledge Network (EMCONET), part of the WHO Commission on the Social Determinants of Health. We describe the Brazilian context of employment conditions, labor conditions and health, their characteristics and causal relationships. The social, political and economic factors that influence these relationships are also p...

Division of labor is a defining characteristic of social insects and fundamental to their ecological success. Many of the numerous tasks essential for the survival of the colony must be performed at a specific location. Consequently, spatial organization is an integral aspect of division of labor. The mechanisms organizing the spatial distribution of workers, separating inside and outside worke...

This paper introduces a discrete event simulation for crew assignments and crew movements as a result of train traffic, labor rules, government regulations and optional crew schedules. The software is part of a schedule development system, FRCOS (Freight Rail Crew Optimization System), that was co-developed by Canadian National (CN) Rail and Circadian Technologies, Inc. The simulation allows ve...

We construct a dynamic, stochastic rational expectations model of labor reallocation that is designed so that its key parameters can be estimated for trade policy analysis. A key feature is the presence of time-varying idiosyncratic moving costs faced by workers. As a consequence of these shocks: (i) gross flows exceed net flows (an important feature of empirical labor movements); (ii) the econ...