Calculating the Efficient Frontier for the Portuguese Stock Market

The paper investigates the efficient frontier and capital market line for the Portuguese stock market before and after the Global Financial Crisis. The efficient frontier and capital market line shift to positions that offer investors better opportunities as we move from 2000‐2008 to 2009–2015.     

Theory of constraints and the combinatorial complexity of the product-mix decision

The theory of constraints (TOC) proposes that, when production is bounded by a single bottleneck, the best product mix heuristic is to select products based on their ratio of throughput per constraint use. This, however, is not true for cases when production is limited to integer quantities of final products. Four facts that go against current thought in the TOC literature are demonstrated in this paper. For example, there are cases in which the optimum product mix includes products with the lowest product margin and the lowest ratio of throughput per constraint time, simultaneously violating the margin heuristic and the TOC-derived heuristic. Such failures are due to the non-polynomial completeness (NP-completeness) of the product-mix decision problem, also demonstrated here.     

Willingness to accept compensation for the environmental risks of oil transport on the Amazon: A choice modeling experiment

This paper looks at the question of whether subsistence level/indigenous people place a value on the preservation of ecosystems independent of direct impacts of environmental change, such as impacts on their production activities. The economics literature generally suggests that non-use values don't exist among the poor and in the informal sector of the economy. We examine this issue through a choice modeling experiment. A survey was conducted of rainforest communities who live on the banks of the Amazon River (Rio Solimões), in the vicinity of proposed oil and gas pipelines. The data were analyzed in the choice modeling framework, revealing relatively high amounts of compensation that were necessary in order to accept the potential ecosystem damages associated with oil transport, even if the people were completely compensated for direct damages such as loss of access to productive resources. These results suggest that environmental quality is important for its own sake, a result that is very different from the implicit assumption among many economists.     

Optimal delegated portfolio management with background risk

Most investors delegate the management of a fraction of their wealth to portfolio managers who are given the task of beating a benchmark. However, in an influential paper [Roll, R., 1992. A mean/variance analysis of tracking error. Journal of Portfolio Management 18, 13–22] shows that the objective functions commonly used by these managers lead to the selection of portfolios that are suboptimal from the perspective of investors. In this paper, we provide an explanation for the use of these objective functions based on the effect of background risk on investors’ optimal portfolios. Our main contribution is to provide conditions under which investors can optimally delegate the management of their wealth to portfolio managers.     

Institutionalization and Depoliticization of the Right to the City: Changing Scenarios for Radical Social Movements

The right to the city, a concept previously associated with radical social movements, has been accepted by several governments and has inspired new public policies. However, some authors see this process of institutionalization as involving a loss of a significant part of the radical origins of the concept. This article approaches this process and the new opportunities and limitations it may entail for social movement organizations with a more radical perspective on the right to the city. We explore the paradigmatic case of Brazil and the action of a particular organization, the Movimento dos Sem Teto da Bahia (MSTB, or Homeless Movement of Bahia) in the city of Salvador. We draw on the discussion of the politics of the right to the city and on an original combination of social movement theories and critical discourse analysis in order to analyse political‐institutional and discursive changes in urban reform in Brazil and Salvador. We then analyse how the MSTB moves within this new context, navigating its tensions and contradictions while advancing a radical project of transformation of urban reality within a reformist context. We also reflect on the relevance of Lefebvrian ideas for understanding and inspiring contemporary struggles for the right to the city.     

Evidence of European Trade and Investment U-Shaping Industrial Output in Bulgaria, Hungary, Poland, and Romania

Industrial output in Central and Eastern Europe evolved in a U-shape during the first seven years of transition. The literature explains the initial collapse of industrial output as an inefficient outcome driven by supply side distortions that constrained the transition process. We show that the U-shape experience of industrial sectors is an outcome driven by an intrasector change, induced by investment demand shocks, in the market orientation of production away from products traditionally sold into the CMEA market and towards products traditionally sold into the EU market. This revisionist view has important implications for policy formation. J. Comp. Econom., December 1999, 27(4), pp. 730–752. LICOS, Centre for Transition Economics, Katholieke Universiteit Leuven, Debériotstraat 34, 3000 Leuven, Belgium; and Department of Economics, Trinity College, Dublin, Dublin 2, Ireland, and LICOS, Centre for Transition, Katholieke Universiteit Leuven, Debériostraat 34, 3000 Leuven, Belgium.     

The effect of the ‘evoking freedom’ technique on sales in a computer-mediated field setting

The ‘evoking freedom’ technique is a verbal compliance procedure which solicits someone to comply with a request by simply telling a person that he/she is free to accept or to refuse the request. However, the effect of this technique has never been tested in a selling context. Previous customers (N = 900) of an extreme sports store were solicited by email to participate in a campaign where they were offered a gift voucher if they persuaded someone to become a new customer of the store. According to the case, the email contained a sentence that stated that they were free to participate or not in the operation. It was found that the ‘evoking freedom’ condition was associated with a higher number of new customers (+8.4%) than the control condition (+4.7%).     

Soft landing in a Markov-switching economy

We analyse the monetary policy implications of boom–bust cycles in asset prices using a Markov-switching rational expectations model. In our simulations, when a bubble bursts, the Taylor rule fails to achieve a soft landing, contrary to the optimal policy.