Milton and phelps argued with the concept of phillips curve because it cannot work in the long run to become aware of aggregate demand and supply.
Government could not trade higher priced goods for lower employment. The phillips curve could accurately guide policy and procedure makers in short run or for a short period of time. This cause a relative negative relation between rate of employment and wage labor curve.
It is argued by the two economists when the nominal rates and wages were adjusted finally. It also states inverse relationship between the various curves operating respect in the economy. It is a upward rising curve.
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