Authoritarian regimes are also sometimes subcategorized by whether they are personalistic or populist. Personalistic authoritarian regimes are characterized by arbitrary rule and authority exercised mainly through patronage networks and coercion rather than through institutitions and formal rules..
Fluid accumulation is the most common cause of conductive hearing loss in the middle ear, especially in children. Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors.
Sometimes the ear drum is unable to vibrate sound properly. Conductive hearing loss can also be a result of fluid in the ear, congenital defects, a foreign body stuck in the ear, or even excess ear wax. Conductive hearing loss is often reversible.