Despite the recovery of the global economy, the unemployment rate is still high. In this regard, countries have implemented various policies aimed at creating employment for young people. One of these policies has been early retirement plans to free up job opportunities for young people; Because they believe that with the presence of the elderly in the workplace, job opportunities for young people will decrease. On the other hand, countries have faced the challenge of aging due to low fertility rates and high life expectancy, which necessitates paying attention to maintaining and creating jobs for this age group. As a result, early retirement schemes were gradually phased out, and social security laws became less generous. Since the choice of different policies can have different costs for the country, it is necessary to select and implement the best policies in accordance with the existing conditions. This article tries to make a comparative study of the policies adopted in different countries and their results as well as empirical studies in this field. The results showed that in most of the surveyed countries, early retirement has led to a decrease in the employment rate of young people and the elderly. They have experienced, and some research suggests, a negative relationship or no clear link between youth unemployment and older employment.