Ivan Castelar

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  • Roberto Tatiwa Ferreira, Herman Bierens, Ivan Castelar, Revista Economia
  • 2005
This paper uses linear and non-linear diffusion index models and combination of them to produce one-step-ahead forecast of quarterly Brazilian GDP growth rate. The non-linear diffusion index models are not only parsimonious ones, but they also purport to describe economic cycles through a Threshold diffusion index model and a Markov-Switching diffusion(More)
The biochemical and nutritional attributes of two soybean (Glycine max (L.) Merr.) cultivars, one susceptible (Seridó) and the other resistant (Seridó-RCH) to stem canker, were examined to assess whether the resistance to pathogens was related to levels of antinutritional and/or defense proteins in the plant and subsequently affected the nutritional(More)
  • Guilherme Irffi, Ivan Castelar, Marcelo Siqueira, Fabrício Linhares
  • 2008
The objective of this paper was to estimate the residential, commercial and industrial demand for electric energy in the Northeast of Brazil in the period 1970-2003. Two different methodologies were used to compute price and income elasticities of demand: i) DOLS, proposed by Stock and Watson (1993); and ii) Regime Switching, proposed by Gregory and Hansen(More)
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