Fuzzy Panel Data Analysis

Authors

  • Muhammet Oguzhan Yalcin Mugla Sitki Kocman University

DOI:

https://doi.org/10.48129/kjs.v48i3.8810

Keywords:

Fixed Effects, Fuzzy Logic, Fuzzy Panel Data Analysis, Panel Data, Random Effects

Abstract

In statistical and econometric researches, three types of data are mostly used as i) cross-sectional, time series and panel data. Cross-sectional data consists as a result of collecting the observations related to the same variables of many units at constant time. Time series data is data type consisted of observations measured at successive time points for single unit.  Sometimes, the number of observations in cross-sectional or time series data is insufficient for carrying out the statistical or econometric analysis. In that cases, panel data obtained by combining cross-sectional and time series data is often used. Panel data analysis (PDA) has some advantages such as increasing the number of observations and freedom degree, decreasing of multicollinearity, and obtaining more efficient and consistent prediction results with more data information. But PDA requires to satisfy some statistical assumptions such as “heteroscedasticity”, “autocorrelation”, “correlation between units”, and “stationarity” and it is too difficult to hold these assumptions in real-time applications. In this study, fuzzy panel data analysis (FPDA) is proposed in order to overcome these constraints of PDA. FPDA is based on predicting the parameters of panel data regression as triangular fuzzy number. In order to validate the performance of efficiency of FPDA, FPDA and PDA are applied to panel data consisted of gross domestic production data from five country groups between the years of 2005-2013 and the prediction performances of them are compared by using three criteria such mean absolute percentage error, root mean square error and variance accounted. All analyses are performed in R 3.5.2. As a result of analysis, it is observed that FPDA is an efficient and practical method, especially in case required statistical assumptions are not satisfied.   

Author Biography

Muhammet Oguzhan Yalcin, Mugla Sitki Kocman University

Faculty of Science Department of Statistics

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Published

24-06-2021