Gender discrimination is defined as unequal or disadvantageous treatment based on gender. It can take direct, indirect, or harassing forms. Direct discrimination is treating someone less favorably than someone of another gender in similar circumstances, like only advertising a job for a "waiter." Indirect discrimination involves rules or policies that disproportionately disadvantage one gender, like requiring all employees to work full-time. Victimization involves treating someone unfairly for complaining about gender discrimination. Gender discrimination is illegal in employment, education, wages, and other areas and can have harmful mental health, workplace, and economic effects.