 Government stimulus spending and mercantilist policies to stimulate exports and reduce imports are other techniques to stimulate demand.He estimated in March 2010 that developed countries representing 70% of the world's GDP were caught in a liquidity trap.Behavior that may be optimal for an individual (e.g., saving more during adverse economic conditions) can be detrimental if too many individuals pursue the same behavior, as ultimately one person's consumption is another person's income.