According to Jeffrey Herbener, Fetter asserted that "just as the price of each consumer good is determined solely by subjective value, the rate of interest is determined solely by time preference."
」依據Jeffrey Herbener的說法，菲特提出了「如同每個消費產品的價格是純粹由主觀價值決定一般，利息的比率也是純粹由時間偏好所決定的。