While lichen planus very rarely leads to oral cancer, irritation of lichen planus by tobacco and alcohol, poorly fitting dentures, and poor oral hygiene can turn lichen planus into the erosive type.
In economics, a deadweight loss (also known as excess burden or allocative inefficiency) is a loss of economic efficiency that can occur when equilibrium for a good or service is not achieved or is not achievable.he deadweight loss is the area of the triangle formed by the grey tax income box (to the right of it), the original supply curve, and the demand curve.
In 1996 President Clinton signed a reform of welfare, and welfare costs declined from 3.4 percent of GDP during the 1990-91 recession to a low of 2.4 percent of GDP in 2000.In the 2001-02 recession welfare costs increased to 3.1 percent of GDP in 2003 and then declined to 2.5 percent of GDP by 2007.But the Great Recession of 2009-10 produced an explosion in welfare costs to a peak of 4.75 percent of GDP in 2010.Welfare costs are expected to decline to 2.66 percent of GDP by 2015 and down to 2.4 percent of GDP by 2020.ut the Great Recession of 2009-10 produced an explosion in welfare costs to a peak of 4.75 percent of GDP in 2010. Welfare costs are expected to decline to 2.66 percent of GDP by 2015 and down to 2.4 percent of GDP by 2020.