Retail competition and shelf space allocation

We develop a model to study shelf space allocation in retail. Retailers compete for consumers not only choosing prices but also by the space allocated to each product on shelves. Our approach depart from the existing literature on shelf allocation, as we model the problem of price setting and shelf allocation in an oligopolistic retail market. We present a simple model of retail competition in which prices are dispersed in the crosssection of stores but shelf allocation is not.

Essays on decision sciences: exploring cognition, information processing, and complexity

This thesis provides three original contributions to the field of Decision Sciences. The first contribution explores the field of heuristics and biases. New variations of the Cognitive Reflection Test (CRT--a test to measure "the ability or disposition to resist reporting the response that first comes to mind"), are provided. The original CRT (S. Frederick [2005] Journal of Economic Perspectives, v. 19:4, pp.24-42) has items in which the response is immediate--and erroneous. It is shown that by merely varying the numerical parameters of the problems, large deviations in response are found. Not only the final results are affected by the proposed variations, but so is processing fluency. It seems that numbers' magnitudes serve as a cue to activate system-2 type reasoning. The second contribution explores Managerial Algorithmics Theory (M. Moldoveanu [2009] Strategic Management Journal, v. 30, pp. 737-763); an ambitious research program that states that managers display cognitive choices with a "preference towards solving problems of low computational complexity". An empirical test of this hypothesis is conducted, with results showing that this premise is not supported. A number of problems are designed with the intent of testing the predictions from managerial algorithmics against the predictions of cognitive psychology. The results demonstrate (once again) that framing effects profoundly affect choice, and (an original insight) that managers are unable to distinguish computational complexity problem classes. The third contribution explores a new approach to a computationally complex problem in marketing: the shelf space allocation problem (M-H Yang [2001] European Journal of Operational Research, v. 131, pp.107--118). A new representation for a genetic algorithm is developed, and computational experiments demonstrate its feasibility as a practical solution method. These studies lie at the interface of psychology and economics (with bounded rationality and the heuristics and biases programme), psychology, strategy, and computational complexity, and heuristics for computationally hard problems in management science.

Sociabilidade homoerótica masculina no Rio de Janeiro na década de 1960: relatos do jornal O Snob

Este trabalho estuda uma rede de sociabilidade homoerótica na cidade do Rio de Janeiro na década de 1960 através da análise dos relatos contidos no jornal doméstico – produzido por um dos grupos e que circulava entre os participantes da rede – O Snob. A rede era composta por vários grupos de convivência que se vinham formando desde a década de 1950, e a maioria dos participantes elaborava suas identidades pessoais compartilhando com a sociedade maior a crença de que pertenceriam ao “terceiro sexo”, “sofrendo” inversão sexual. Assim se desenvolveu uma forma de sociabilidade peculiar, caracterizada por encontros festivos em domicílios como estratégia de sobrevivência, visto que as expectativas sociossexuais dos grupos eram envoltas em hostilidade da sociedade maior. Desta maneira esse estudo aponta processos de sociabilização empreendidos pela rede, moldados na invisibilidade, configurando-se, ainda que de maneira não articulada (ou involuntária), em experiência de conquistas dos direitos civis e sociais ao promover ações práticas que possibilitavam encontros de seus membros e que podem ser traduzidas como o direito de ir e vir, o direito de livre expressão, ainda que num espaço segregado (ou segredado?), direitos básicos, que, no entanto, não eram garantidos aos participantes da rede. Evidencia, nessa trajetória, os processos de ressignificação identitária que os grupos vivenciaram ao longo do período estudado.