Deadweight Loss The costs to society created by an inefficiency in the market. Investopedia Says: Mainly used in economics, the term "deadweight loss" can be applied to any deficiency due to an inefficient allocation of resources. Lost production due to inaccurate forecasting for labor is an example of a deadweight loss. Related Terms: Dismal Science Economics Equilibrium Keynesian Economics Laissez Faire Living Wage Macroeconomics Microeconomics |