Impacts of Asynchronous Learning Networks on Individual and Group Problem Solving: A Field Experiment

An Asynchronous Learning Network (ALN) is a Computer-Mediated Communication System designed to support "anytime/anywhere" interaction among students and between students and instructors. A field experiment compared groups and individuals solving an ethical case scenario, with and without an ALN, to determine the separate and joint effects of communication medium and teamwork. Dependent variables include quality and length of the reports, and subjective perceptions of learning and satisfaction. The results indicate that that an ALN enhances the quantity and quality of the solutions to an ethical case scenario. The combination of teamwork with ALN-support increases the students' perception of learning. Although the perception of collaborative learning was similar between ALN-supported and unsupported groups, participants in computer-mediated groups reported lower perceptions of discussion quality than participants in manual groups.     

Returns to Regionalism: An Analysis of Nontraditional Gains from Regional Trade Agreements

The past decade has witnessed a renewed interest in regionaltrade agreements, with many policymakers and academics seemingto believe that these provide more than the traditional gainsfrom trade. This article examines several possible benefitsthat regional trade agreements may confer on their partners,including credibility, signaling, bargaining power, insurance,and coordination. It assesses the necessary conditions for eachpossible channel to work, gives stylized examples of specifictypes of policy where the benefit might be applicable, examinescases where the explanation might be relevant, and discussestheir overall plausibility. It concludes by examining the NorthAmerican Free Trade Agreement and the Europe Agreements.     

Transitions to and From Self-employment in Spain: An Empirical Analysis

This paper investigates the influence of individual characteristics and the business cycle on the probability of entry into self-employment and on self-employment duration. We estimate multinomial logit and discrete competing risks models using data from a longitudinal sample of Spanish men for the period 1985–1991. The results indicate that unemployment raises the probability of entering self-employment, but also increases the hazard of leaving self-employment, especially into unemployment. Moreover, receiving unemployment benefits significantly reduces the probability of entering self-employment. Liquidity constraints are important in determining enterpreneurial selection, but only for those who become self-employed with employees.     

THE EFFECT OF MATERNAL EMPLOYMENT AND CHILD CARE ON CHILDREN'S COGNITIVE DEVELOPMENT*

This article develops and estimates a dynamic model of employment and child care decisions of women after childbirth to evaluate the effects of these choices on children's cognitive ability. We use data from the National Longitudinal Survey of Youth to estimate it. Results indicate that the effects of maternal employment and child care on children's ability are negative and sizable. Having a mother that works full‐time and uses child care during one year is associated with a reduction in ability test scores of approximately 1.8% (0.13 standard deviations). We assess the impact of policies related to parental leave and child care on children's outcomes.     

The Influence of Informality in a Local Agri-food Supply Chain in Brazil

During qualitative research on trust, conducted in a mariculture chain in southern Brazil, the theme of informality emerged spontaneously in most interviews. Although it is difficult to measure, some data and estimates point out that informality is still quite present worldwide, but especially in emerging and developing countries, and this situation was confirmed in the studied supply chain. In analysing the narratives, we noticed that this is a chronic issue which bothers the producers that are properly formalised mainly because of unfair competition, and hinders the organisation of the chain. Some factors foster the persistence of informality, such as family labour and temporary jobs, the low educational level of entrepreneurs, lack of adequate supervision and cultural aspects of producers and their families. We could corroborate the perspectives of modernisation (informality is still persistent), neo-liberal (informal entrepreneurs reject the bureaucracy of an over-regulated market) and post-structuralist (informality is a way of life related to identity, social position and/or resistance against the formal structure) theories. Our research has shown us that the situation found is contributing to a reduction in the number of formal producers and impairing the development of that local supply chain, as well as its sustainability.     

Using social media to report financial results

The growing influence of social media on financial performance reporting creates opportunities and challenges for both executives and corporate communications teams. This Accounting Matters feature provides background on current business reporting practices (including new SEC regulations) and insights from recent research on communication of financial results. The conclusion discusses future trends and provides recommendations for executives to consider when designing, implementing, and evaluating media and investor relations communication initiatives.     

Evaluating social welfare and redistributive effects of Spanish personal income tax reform

Spain has recently concluded a process of wide-ranging reform of its personal income tax (IRPF), in force since 1992. The new IRPF is applicable from 1999 onward. The aim of this article is to analyse the implications of this tax reform for the distribution of personal income, and additionally to provide a comparative evaluation in terms of social welfare of both taxes. Empirical analysis is performed by a simulation exercise, employing the microdata contained in the Institute of Fiscal Studies’?IRPF Panel of Taxpayers. The analysis shows that the new IRPF induces a redistributive effect slightly lower than the old IRPF. The greater redistributive potential of the progressive structure of the new tax proves to be insufficient to compensate for the contrary effect caused by reduction in the level of tax liability. However, this new tax unambigously permits, in an inequality-adverse society, a higher level of social welfare than that attained by the old tax.     

Investors’ perspective on portfolio insurance

Portuguese Economic Journal - This study supports the use of behavioural finance to explain the popularity of portfolio insurance. Portfolio insurance strategies are important financial solutions...     

Democracy on the edge: limits and possibilities in the implementation of an urban reform agenda in Brazil

The 1990s in Brazil were a time of institutional advances in the areas of housing and urban rights following the signing of the new constitution in 1988 that incorporated the principles of the social function of cities and property, recognition of the right to ownership of informal urban squatters and the direct participation of citizens in urban policy decision processes. These propositions are the pillars of the urban reform agenda which, since the creation of the Ministry of Cities by the Lula government, has come under the federal executive branch. This article evaluates the limitations and opportunities involved in implementing this agenda on the basis of two policies proposed by the ministry — the National Cities Council and the campaign for Participatory Master Plans — focusing the analysis on government organization in the area of urban development in its relationship with the political system and the characteristics of Brazilian democracy.