He developed the "Lucas critique" of economic policymaking, which holds that relationships that appear to hold in the economy, such as an apparent relationship between inflation and unemployment, could change in response to changes in economic policy.
他开发了有关经济政策制度的「卢卡斯批判」，认为对于那些在一个经济中表现出的关系，例如通货膨胀和失业之间很明显的关系，会随着经济政策的变化而变化。