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논문 기본 정보

자료유형
학술저널
저자정보
Desi Yuniarti (Universitas Gadjah Mada) Dedi Rosadi (Universitas Gadjah Mada) Abdurakhman (Universitas Gadjah Mada)
저널정보
대한산업공학회 Industrial Engineering & Management Systems Industrial Engineering & Management Systems Vol.22 No.2
발행연도
2023.6
수록면
120 - 131 (12page)
DOI
10.7232/iems.2023.22.2.120

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초록· 키워드

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The estimation of a panel data regression model can be biased due to outliers. Meanwhile, the robust estimation method for an unbalanced panel data regression model is limited. In general, the robust estimation method proposed in previous studies did not consider the panel data structure, which consists of several cross-sections and time-series units. As a consequence, the trimming process for observations seen as outliers can completely remove all observations from a cross-section unit. This trimming process may result in biased cross-section unit estimation. Based on these problems, in this study, we proposed a panel influence matrix for detecting outliers and determining robust estimates of a one-way unbalanced panel data regression model with a fixed-effects approach. This method considers an unbalanced panel data structure formed of several cross-section units. We applied our proposed robust procedure to three unbalanced panel data schemes. The robust estimate results obtained using the panel influence matrix were compared to those obtained using the within transformation and the influence matrix, disregarding the cross-section and time-series units in the panel data. Based on Mean Squared Error (MSE) value, the robust estimation result using the panel influence matrix gave the best results for all the research data schemes with the smallest MSE value compared to other methods.

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ABSTRACT
1. INTRODUCTION
2. UNBALANCED PANEL DATA REGRESSION MODEL
3. PANEL INFLUENCE MATRIX FOR UNBALANCED PANEL DATA REGRESSION MODEL
4. ROBUST PROCEDURES OF UNBALANCED PANEL DATA REGRESSION MODELS
5. ANALYSIS AND DISCUSSION
6. CONCLUSIONS AND RESEARCH DEVELOPMENT
REFERENCES

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