This paper deals with modelling income distributions in the Czech
Republic in 1992–2007. The net annual income per capita for Czech households
is evaluated from data based on the microcensus and the EU-SILC
2005–2008. For all analysed years the distribution of incomes was estimated
in the whole sample as well as in the subgroup of households, whose heads
are physicists (or experts in related sciences), architects and engineers. In
the paper the three-parametric lognormal distribution is used as a model. Unknown
parameters are estimated with the use of four methods – those of maximum
likelihood, quantiles, moments and L-moments.