- The Doubly Regularized Quantile Regression
- The Doubly Regularized Quantile Regression
- ㆍ 저자명
- Choi. Ho-Sik,Kim. Yong-Dai
- ㆍ 간행물명
- 한국통계학회 논문집
- ㆍ 권/호정보
- 2008년|15권 5호|pp.753-764 (12 pages)
- ㆍ 발행정보
- 한국통계학회
- ㆍ 파일정보
- 정기간행물|ENG| PDF텍스트
- ㆍ 주제분야
- 기타
The $L_1$ regularized estimator in quantile problems conduct parameter estimation and model selection simultaneously and have been shown to enjoy nice performance. However, $L_1$ regularized estimator has a drawback: when there are several highly correlated variables, it tends to pick only a few of them. To make up for it, the proposed method adopts doubly regularized framework with the mixture of $L_1$ and $L_2$ norms. As a result, the proposed method can select significant variables and encourage the highly correlated variables to be selected together. One of the most appealing features of the new algorithm is to construct the entire solution path of doubly regularized quantile estimator. From simulations and real data analysis, we investigate its performance.