ケインズの概要

「雇用、利子、貨幣の一般理論」に主張される点を纏めたいと思っています。
The main points seem to be:
1. Investment is determined based on the excess of the marginal efficiency of capital above the interest rate and based on the liquidity preferences of holders of capital.
2. The marginal efficiency of capital is based on the forecast of demand.
3. Demand is based on future consumption. This depends on the marginal propensity to consume.
4. Employment depends on investment.
In modern economic times, equilibria are reached in which full employment does not occur (people who would prefer to work at the current wage level are unable to). This is due to an inefficient distribution of capital which keeps interest rates too high and consumption too low. Both of these elements serve to divert investment away from productive (employment-creating) enterprise. The author thus recommends that the state control investment of capital and determine thus how much is produced in given industries.