The Equilibrium in Product and Money market Note that in the above system, Y and i are 7 the endogenous variables which need to ber determined by the system. All the others can be regarded as being either exogenous, or parameters, which are supposed to be given In particular, G and are the policy variable while t is a policy parameterThe Equilibrium in Product and Money Market • Note that in the above system, Y and i are the endogenous variables which need to be determined by the system. All the others can be regarded as being either exogenous or parameters, which are supposed to be given. In particular, G and are the policy variable while t is a policy parameter. M