The aim of this note is to calculate seasonality indexes of monthly prices received by dairy farmers in Rio Grande do Sul from 1986 to 2009. Additionally, to show the seasonal indexes for two different periods of Brazilian economy: before economic stabilization (1986-1994) and after economic stabilization (1995-2009). The hypothesis to be tested, with the method proposed by KAZMIER (1982), is the one that the seasonal influence on the prices in the period of economic stabilization differs of the period of high inflation rates of the Brazilian economy. The seasonal effects on monthly prices received by dairy farmers in Rio Grande do Sul were lesser in the period of economic stabilization than in the period of high inflation rates.
seasonality; prices; milk
