The "senpai–kōhai" system also prevails in Japanese businesses. The social environment in Japanese businesses is regulated by two standards: the system of superiority and the system of permanent employment. The status, salary, and position of employees depend heavily of seniority, and veteran employees generally take the highest positions and receive higher salaries than their subordinates. Until the turn of the 20th and 21st centuries, employment was guaranteed for life and thus such employees did not have to worry about losing their positions.