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.
Welfare is defined in the dictionary as aid in the form of money or necessities to those in need. Corporate welfare can include tax breaks and grants, amongst other things. Proponents of giving grants and tax breaks to corporations argue that they are necessary in order to lure companies to a country or state.