Two stage least squares estimation in structural cointegration models

This paper considers single-equation estimation of simultaneous equation models with integrated processes. The aim of the paper is to investigate asymptotic and small sample properties of some estimators in this framework. We deal with two groups of estimators: such that originally were designated for reduced form estimation and such for simultaneous equation models. In the first group we deal with Least Squares and Fully Modified Least Squares. The second group comprises Two Stage Least Squares and two modifications of it. The asymptotic analysis in section 2 shows that it is true that all estimators are super-consistent in this context but in principle, only the methods of the second group enable valid inference. Section 3 presents the results of a simulation study which is designed for specific problems of simultaneous equation models. This paper was presented at the European Meeting of the Econometric Society in Istanbul, 1996. The author thanks an anonymous referee for helpful suggestions.     

THE COLOR OF THE UNDERGRADUATE EXPERIENCE AND THE OCCUPATIONAL ATTAINMENT OF BLACKS AND WHITES: Evidence from Longitudinal Data

This study examines the impact of attendance at colleges with higher black enrollment on occupational attainment. The unique multipopulation LISREL models focus on blacks and whites, specify income and occupational self-direction as distinct dimensions of labor market accomplishment, and adjust for the possible confounding influence of college selectivity and precollege self-appraisals. Data from the NLS-72, augmented by selectivity and black enrollment data from other sources, are utilized. Findings largely support the hypothesis of within-race parity in occupational attainment. Black enrollment exerts nonsignificant effects on income among blacks and occupational self-direction in both races and slightly enhances income among whites.     

Farmer Knowledge and Risk Analysis: Postrelease Evaluation of Herbicide-Tolerant Canola in Western Canada

The global controversy regarding the use of genetically modified (GM) crops has proved to be a challenge for "science-based" risk assessments. Although risk analysis incorporates societal perspectives in decision making over these crops, it is largely predicated on contrasts between "expert" and "lay" perspectives. The overall objective of this study is to explore the role for farmers' knowledge, and their decade-long experience with herbicide-tolerant (HT) canola, in the risk analysis of GM crops. From 2002 to 2003, data were collected using interviews ( n = 15) and mail surveys ( n = 370) with farmers from Manitoba and across Canada. The main benefits associated with HT canola were management oriented and included easier weed control, herbicide rotation, and better weed control, whereas the main risks were more diverse and included market harm, technology use agreements (TUAs), and increased seed costs. Benefits and risks were inversely related, and the salient factor influencing risk was farmer experiences with HT canola volunteers, followed by small farm size and duration using HT canola. These HT volunteers were reported by 38% of farmers, from both internal (e.g., seedbank, farm machinery, etc.) and external (e.g., wind, seed contamination, etc.) sources, and were found to persist over time. Farmer knowledge is a reliable and rich source of information regarding the efficacy of HT crops, demonstrating that individual experiences are important to risk perception. The socioeconomic nature of most risks combined with the continuing "farm income crisis" in North America demonstrates the need for a more holistic and inclusive approach to risk assessment associated with HT crops and, indeed, with all new agricultural technology.     

Income effects of divorce in families with dependent children

The Norwegian post-divorce transfer scheme for families with children guarantees minimum maintenance payments from the non-custodial to the custodial parent. We studied the economic effects of divorce in such families. When the mother has custody, she falls behind before maintenance payments. After adding these, the outcomes at the median are very similar for both parents, contrasting studies from other countries, but the risk of a drop in equivalized income is large.     

Leaving the Nordic Path? The Changing Role of Danish Trade Unions in the Welfare Reform Process

For a long period, Denmark has been labeled a ‘model country’ with a comprehensive welfare state and a successful model of corporatist policy‐making. Danish unions are considered amongst the strongest in the world, and they have for a long time been a distinct part of the political system, and as social partners, they were strongly integrated into decision‐making processes. The analysis of the Danish welfare and labour market policy during the last two decades documents a profound change in the arrangement and in the status of the social partners (especially unions) in the Danish political system. The results show that two important pillars of the Danish model – the social partner basis and the collective trust in partnership – are eroding. Unions are no longer part of the law‐making process and, since 2007, they are formally excluded from the organization of the decision‐making process. Recent developments point at weaker unions that operate more as lobbyists instead of being strong corporatist institutions or part of the decision‐making process. The results of the study are thought‐provoking and the basis for a revised thinking of the Danish and the Nordic model.     

Changes in professional vision in the context of practice

In initial teacher education, it is a challenge to foster the development of teaching skills proximal to classroom action. In this study, the impact of a combined practical and theoretical university-based term on preservice teachers’ professional vision is investigated by a video-based approach to supervising their knowledge acquisition and assessing their learning outcomes. Participants were N = 109 preservice teachers attending a 5-month theory practice term guided through video-based courses about effective teaching and learning. We measured their changes in professional vision using the video-based tool Observer. Our results show that preservice teachers positively change their professional vision during the theory practice term, especially if they show low entry levels at the beginning. Their notes on the observed teaching lessons illustrate these changes.