Modelling and Data Analysis
2023. Vol. 13, no. 4, 59–83
doi:10.17759/mda.2023130404
ISSN: 2219-3758 / 2311-9454 (online)
Comparative analysis of the effectiveness of methods for constructing quite interpretable linear regression models
Abstract
Previously, the author managed to reduce the problem of constructing a quite interpretable linear regression, estimated using ordinary least squares method, to a mixed-integer 0-1 linear programming problem. In such models, the signs of the estimates correspond to the substantive meaning of the factors, the absolute contributions of the variables to the overall determination are significant, and the degree of multicollinearity is small. The optimal solution to the formulated problem can also be found by generating all subsets method. The purpose of this article is to conduct a comparative analysis of the effectiveness of these two approaches. To conduct computational experiments, 5 sets of real statistical data of various volumes were used. As a result, more than 550 different mixed-integer 0-1 problems were solved using the LPSolve package under different conditions. At the same time, the efficiency of solving similar problems using the generating all subsets method in the Gretl package was assessed. In all experiments, our proposed method turned out to be many times more effective than the generating all subsets method. The highest efficiency was achieved in solving the subset selection problem from 103 variables, solving each of which by generating all subsets would require estimating approximately 2103 (10.1 nonillion) models, which a conventional computer would not have been able to cope with in 1000 years. In LPSolve, each of these problems was solved in 32 – 191 seconds. The proposed method was able to process a large data sample containing 40 explanatory variables and 515,345 observations in an acceptable time, which confirms the independence of its effectiveness from the sample size. It has been revealed that tightening the requirements for multicollinearity and absolute contributions of variables in the linear constraints of the problem almost always reduces the speed of its solution.
General Information
Keywords: linear regression, ordinary least squares method, interpretability, mixed-integer 0-1 linear programming problem, generating all subsets method, contributions of variables to determination, multicollinearity, efficiency
Journal rubric: Optimization Methods
Article type: scientific article
DOI: https://doi.org/10.17759/mda.2023130404
Received: 30.10.2023
Accepted:
For citation: Bazilevskiy M.P. Comparative analysis of the effectiveness of methods for constructing quite interpretable linear regression models. Modelirovanie i analiz dannikh = Modelling and Data Analysis, 2023. Vol. 13, no. 4, pp. 59–83. DOI: 10.17759/mda.2023130404. (In Russ., аbstr. in Engl.)
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