[经] elasticity of tax to national income
guó mín shōu rù de shuì shōu tán xìng ㄍㄨㄛˊ ㄇㄧㄣˊ ㄕㄡ ㄖㄨˋ ㄉㄜ˙ ㄕㄨㄟˋ ㄕㄡ ㄊㄢˊ ㄒㄧㄥˋ