The Phillips Curve

Phillips (1958) investigated business cycles from 1861 to 1957. 
Whether the Phillips curve ever really existed or not, the data on
inflation and unemployment tells important stories about business cycles. 

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United States  United Kingdom  Australia  Canada  Japan  France  Italy

Phillips, A. W. H. "The Relation between Unemployment and the
Rate of Change of Money Wage Rates in the United Kingdom, 1861-1957."
Economica NS
25, no. 2 (1958): 283-99.