Above a rather low level of income (enough to satisfy basic needs), Easterlin found no correlation between happiness and GNP per head. In other words, GNP is a poor measure of life satisfaction.
从一个非常低的收入水平开始（仅足以满足基本需求），伊斯特林并没有发现幸福和人均GNP之间具有相关性。换句话说，GNP绝不是衡量生活满意度的好指标。