[经济学模型] 求教传统凯恩斯模型中的收入对债券需求的影响 [推广有奖]

when income increases, the Mt will increase, which will push up the interest rate. As interest rate is negatively relaed to Ma, Ma thus decreases. As in this model, the only ways to store wealth is holding cash or bonds, therefore, demand for bond rise.

Md/P=m0+kY-lr,where Y is income,r is real rate of interest.