Labor market effects of immigration in the United States and Europe: substitution vs. complementarity

This paper examines the impact of immigrants on the income of various groups of resident workers in the United States and Europe. Our approach features the use of a production technology incorporating education, experience, and unskilled labor as inputs. This contrasts with the assumption used in earlier studies that native-born and immigrant labor are distinct inputs into production. We find that in both United States and European production, education, unskilled labor and experience are complementary inputs. Based on these results, simulations of the impact of immigration on residents are carried out. The absolute magnitude of these effects is found to be very small.This paper was presented at the Centre for Economic Policy Research Workshop, The Economics of International Migration: Econometric Evidence, February 26 and 27, 1993, Konstanz, Germany. We benefitted from the discussion at the conference and, particularly, the comments of Anton Muscatelli. We thank three referees and the managing editor of this journal for their suggestions. We also thank Selig Sechzer for his significant contributions to the empirical analysis in this paper. Ira Gang's work was partially supported by the Rutgers University Research Council.     

Production planning in practice

The changes and pressures facing the manufacturing and engineering industries today are increasing the importance of effective aggregate manpower and production planning. Several different theoretical optimisation models to tackle this problem have been described in detail in the literature but there have been few applications of them in practice.The reasons for this are many but include: the difficulty in expressing managements' conflicting and mixed objectives in an objective function; the necessity to oversimplify real life systems to enable these methods to be used; the simplistic approach to manpower planning used in these models; the difficulty in gaining managements' acceptance and finally the fact that what management actually wants is a tool to assist them in planning and decision making.What is being used by many managements is a case-study deterministic simulation model. Many companies are adopting this type of model for all types of planning and twelve out of twenty-seven companies visited in a research project described in this paper were using this type of model for aggregate manpower and production planning. It is proving to be an effective management tool and is being readily accepted principally because modern specialised financial modelling languages are enabling these models to be built, understood and used by non-specialist managers.     

Undocumented workers in the labor market: an analysis of the earnings of legal and illegal Mexican immigrants in the United States

This paper studies the differences in earnings between Mexican legal and illegal immigrants in the United States. The analysis includes a cross-sectional examination of the wage differences between legal and undocumented workers as well as a longitudinal analysis examining the impact of legalization on the earnings of previously-undocumented workers. It is shown that the average hourly wage rate of male Mexican legal immigrants in the United States was 41.8% higher than that of undocumented workers while female legal immigrants earned 40.8% more. Though illegal immigrants have lower education and English proficiency, and a shorter period of residence in the United States, than legal immigrants, it is shown that differences in the observed characteristics of legal and illegal immigrants explain only 48% of the log-wage gap between male legal and illegal workers and 43% of the gap for women. An analysis of undocumented immigrants legalized after the 1986 U.S. immigration policy reform shows significant wage growth in the four years following legalization. These gains are due mostly to the change in legal status itself, not to changes in the characteristics of immigrants over time. Received: 7 July 1997/Accepted: 16 March 1998