[经] loanable-funds theory of interest

lì xī de kě dài zī jīn lǐ lùn ㄌㄧˋ ㄒㄧ ㄉㄜ˙ ㄎㄜˇ ㄉㄞˋ ㄗ ㄐㄧㄣ ㄌㄧˇ ㄌㄨㄣˋ