Value of $100 in 1928, adjusted to 1970

What happened to prices between 1928 and 1970

Between 1928 and 1970, the Consumer Price Index went from 17.1 to 38.8. Cumulatively, prices increased 126.9%, which works out to an average of 1.97% per year. Put differently, a dollar in 1928 bought what $0.44 buys in 1970.

Consumer prices fell 1.7% in 1928, the second straight year of mild decline even as the stock market climbed sharply, a widening gap between asset prices and the cost of living that later economists pointed to as an early warning sign. The Federal Reserve tightened policy repeatedly over the year, raising its discount rate in an effort to slow the flood of borrowed money pouring into stock purchases without derailing the broader economy, a balancing act it ultimately failed to manage. Herbert Hoover won the presidential election that November, defeating Democrat Al Smith on a platform built around continuing the prosperity of the Coolidge years; few voters or policymakers anticipated how quickly that prosperity would end. First-class postage remained at 2 cents, a price that had now held for nine straight years.

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The destination year: 1970

Consumer prices rose 5.7% in 1970, up from 1969’s 5.5%, extending a run of faster price growth that stretched back to the mid-1960s, even as a recession that began in December 1969 pushed unemployment toward 6%. Prices and joblessness rising together confounded the era’s economic thinking, which held that policymakers could trade a little more inflation for a little less unemployment; 1970 was an early sign that trade-off was breaking down, a pattern that would harden into stagflation later in the decade. Washington restructured how it delivered mail that year: after postal workers staged the first strike ever by federal employees that March, Congress passed the Postal Reorganization Act in August, replacing the cabinet-level Post Office Department with the independent U.S. Postal Service. Environmental policy also took shape in 1970. An estimated 20 million Americans marked the first Earth Day on April 22, and the Environmental Protection Agency opened that December to enforce the Clean Air Act and the pollution rules that followed. The Vietnam War kept dividing the country: on May 4, National Guard troops fired on antiwar demonstrators at Kent State University in Ohio, killing four students and setting off strikes on hundreds of campuses. A median household earned $8,734 that year, a gallon of gas averaged 36 cents, and a first-class stamp cost 6 cents, the rate it had held since 1968. Prices stood 291.9% above their 1913 level by the end of 1970, a milestone that would look almost mild against the decade still to come.

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