Estimates of parameters of log-normal model of households income distribution

While making a statistical model it is important both, to find a theoretical distribution function that would characterize empirical frequency distribution and to choose a suitable method of parameter estimate of such model. Recently used type of a theoretical model of income distribution (the log-normal distribution) was derived from the character of a particular feature and from a longtime experience with its behavior before revolution. The log-normal distribution, especially its variation with three parameters, has served a good approximation of income distribution of most of social classes. An important aspect of income distribution modeling is choice of suitable parameter estimate of the relevant logarithm-normal curves.