期刊名称：Journal of Agribusiness and Rural Development
印刷版ISSN：1899-5241
电子版ISSN：1899-5772
出版年度：2019
卷号：52
期号：2
页码：173-177
DOI：10.17306/J.JARD.2019.00445
出版社：Uniwersytet Przyrodniczy w Poznaniu
摘要：In Popławski and Kaczmarczyk (2013) a method
referred to as UEK was presented and used as a tool in the
analysis of sustainable rural development. The purpose of this
paper is to demonstrate the methodological inappropriateness
of that method. In the linear regression model, the matrix of
explanatory variables can have either less than full or full column
rank. While all regression parameters are non-estimable
in the first case, the well-known and widely used ordinary
least squares method can be applied in the second one.
