We study the consequences of measurement error in dependent variable random‐coefficients models, focusing on particular case quantile regression. The popular regression estimator Koenker and Bassett (1978) is biased if there an additive term. Approaching this problem as errors‐in‐variables where suffers from classical error, we present a sieve maximum likelihood approach that robust to left‐han...

this paper defines how a meta heuristic search engine called p.s.o can be used to maximize the objective function of a logistic regression model, describing the relationship between the response variable (product designs' score) and a set of explanatory variables (product design factors). at the first phase the processed data, classified and categorized, by kansie engineering is used as input t...

This research was done aimed to investigation the effective factors on production skills of tobacco growers in Mazandaran province. This is an applied study based on descriptive-correlation method. Statistical population of this research consisted of 1500 tobacco growers  of Mazandaran province, and 306 people were selected based on Morgan table. Content validity of the questionnaire was determ...