Richard Lipsey developed it in a broader context, clarifying the adjustment function. Robert Solow and Paul Samuelson found that it also held in the United States and made it relevant to policymakers by introducing mark-up pricing. Edmund Phelps and Milton Friedman questioned its stability in the long run, arguing that the government could not maintain a permanent tradeoff between the two quantities in question, disagreeing with the findings made in the article "Analytics of Anti-Inflation Policy" with their view of the natural-rate hypothesis.  FTP, name this relationship depicting the inverse relation between the rate of unemployment and the rate of change of money wages in a certain curve.
Richard Lipsey developed it in a broader context, clarifying the adjustment function. Robert Solow and Paul Samuelson found that it also held in the United States and made it relevant to policymakers by introducing mark-up pricing. Edmund Phelps and Milton Friedman questioned its stability in the long run, arguing that the government could not maintain a permanent tradeoff between the two quantities in question, disagreeing with the findings made in the article "Analytics of Anti-Inflation Policy" with their view of the natural-rate hypothesis.  FTP, name this relationship depicting the inverse relation between the rate of unemployment and the rate of change of money wages in a certain curve.
Richard Lipsey developed it in a broader context, clarifying the adjustment function.
Phillips curve