The report I did. Recently, the teacher in Econometric asked students to do a final report. I chose to use "ordered probit model" to analyze the causality between the elderly's health status and some variables. The motivation is that it's an aged society in Taiwan. The elderly ratio keeps increasing every year. Therefore, I think the medical resources should become more important. In my report, I used the data which is about the elderly's health status survey in 2003 in Taiwan. The empirical results showed that the interviewees' age, education year, living area, some hobbies like smoking, drinking, exercising, etc will affect the interviewees' health. In addition, I also analyzed the reasons of choosing different types of medical resources, and also found some interesting results. For example, the interviewees who have chronic ill tend to choose the Western Medicine, but not the Traditional Chinese Medicine. After finishing this report, I think the elderly care is important!