比如，我们依赖这类模型解释“节俭悖论 ” — —个体增加储蓄的决定可能抑制支出和产出，最后导致全体储蓄总量变少。
We rely on such models to explain, for example “the paradox of thrift,” whereby individual decisions to increase saving can, by depressing spending and output, result in the population as a whole saving less.