Unemployment refers to a situation where a person actively seeks work but is unable to find a job at the prevailing wage. There are several types of unemployment including open unemployment where unemployed persons remain without work. Cyclical unemployment is related to trends in industries and the business cycle. Frictional unemployment occurs when workers leave jobs to search for new ones or enter the workforce for the first time. Seasonal unemployment is employment that only occurs during particular seasons, with partial or full unemployment the rest of the year.