Fear of mice in general. Fear of mice Fear of mice and rats is one of the most common specific phobias. It is sometimes referred to as musophobia (from Greek "μῦς" "mouse") or murophobia (a coinage from the taxonomic adjective "murine" for the family Muridae that encompasses mice and rats), or as suriphobia, from French "souris", "mouse". The phobia, as an unreasonable and disproportionate fear, is distinct from reasonable concern about rats and mice contaminating food supplies, which may potentially be universal to all times, places, and cultures where stored grain attracts rodents, which then consume or contaminate the food supply. In many
Abnormal profit Abnormal profit persists in the long run in imperfectly competitive markets where firms successfully block the entry of new firms. Abnormal profit is usually generated by an oligopoly or a monopoly; however, firms often try to hide this fact, both from the market and government, in order to reduce the chance of competition, or government intervention in the form of an antitrust investigation. In principle, there are three kinds of abnormal profit: Business writer Michael Porter and Anita M. McGahan undertook an empirical study of the "emergence and sustainability of abnormal profits" in 2003, in which they concluded that both