O objetivo deste artigo foi identificar sinais de excesso de confiança nos preços entre produtores de milho do Sul e do Centro-Oeste do Brasil. Entre outubro e novembro de 2008, 90 produtores foram selecionados para responderem questões relacionadas a seus conhecimentos do mercado futuro e a...

While the biofouler Corbicula fluminea (Müller, 1774) is known to cause great economic losses in North America, studies reporting the problem in Europe are much scarcer. This paper explores the industrial effects of the species in Portugal, the gateway by which the bivalve entered Europe around...

Since the middle of the 90’s, rice has been one of the main agricultural products imported by Brazil, particularly from Uruguay and Argentina, which very often raises concerns to Brazilian rice producers. This paper aims to analyze the factors that determine the Brazilian rice imports,...

A process to store solar energy to be used as thermal energy, with controlled input, may be represented by a stochastic process Xn, N = 0, 1, 2, ... with initial value Xo and a sequence of independent, identically distributed (i.i.d.) nonnegative random variables, Yi, i [epsilon] , where Xn + 1...

Consider a stochastic process {Xn}, n = 0, 1, 2, ... with initial value X0 and a sequence of independent, random variables, {Yi}, i [epsilon] N with exponential distribution with parameter one, where Xn+1 = max(Xn, [alpha]Xn + Yn+1), 0 [alpha] 1. In this paper, we show that this sequence...