The Effect of Peer Effects on Youth Smoking, Drinking r Drug Using：A Case Study on Panel Data

The data source of this study is Taiwan Youth Project from Academic Sinica. Our purpose is to use TYP data collected year by year since 2000 to 2006. We try to divided the data into three parts, one is when the sample is junior, the other is senior and another is senior to college. We use Probit Model in junior, Pooled Probit Model and Conditional Fixed Effect Logit Model in senior and senior to college to find out how peer effect influenced the youth smoking, drinking and drug using. 　Our result is that peer effect has a positive effect on youth smoking, drinking and drug using. The male is significant than female. The higher in grades is less in smoking, drinking and drug using. On the period of senior and senior to college, we add the variable of in school or not. We find that the youth in school is less significant in smoking, drinking and drug using than not in school. When the period is getting longer, we find that the variables of father alive or not and father education is more significant. Father alive or not is significant negative in youth smoking, drinking or drug using. Father education is significant positive in youth smoking, drinking or drug using.