6Sloan, Frank A, Edward C Norton. Adverse Selection, Bequests, Crovcding out, and Private Demand for Insurance.- Evidence from the Long--term Care Insurance Market[J]. Journal of Risk and Uncertainty, 1997 (15) : 201--219.
7Kazutoshi Miyazawa,Panos Moudoukoutas, Tadashi Yagi. Is Public Long--Term Care Insuranee Necessary[J]. The Journal of Risk and Insurance, 2000. 67 (2) 249-264.