黏性为经济学中的一个广泛使用的概念，用来表示某一种变量变化较为缓慢。较为典型的为“价格僵固”（英文：Sticky Prices），在个体经济学中指在动态的竞争市场模型下，由于市场压力等因素，其产品价格和工资仍然保持在一定的水平上。其包括菜单成本、货币幻觉、不完全信息和公平性考虑等原因。在宏观经济学中，黏性价格可以用于解释为什幺市场在短期内难以达到平衡。

价格僵固使产品的价格不能随着经济而立刻变化到达新帕累托最优，并在某种程度上导致市场失灵。

Nominal rigidity, also known as price-stickiness or wage-stickiness, describes a situation in which the nominal price is resistant to change. Complete nominal rigidity occurs when a price is fixed in nominal terms for a relevant period of time. For example, the price of a particular good might be fixed at $10 per unit for a year. Partial nominal rigidity occurs when a price may vary in nominal terms, but not as much as it would if perfectly flexible. For example, in a regulated market there might be limits to how much a price can change in a given year.