>Between 1870 and 1900 [1], America’s inflation-adjusted gross national product expanded by an unprecedented 233%. Though the population nearly doubled, real per capita GNP surged by 90%. Real wages of nonfarm employees grew by 53%, and life’s staples, such as food, clothing and shelter, became more plentiful and much cheaper. Food prices plummeted by 63% and the cost of textiles, fuel and home furnishings fell by 70%, 65% and 70%, respectively. The illiteracy rate fell by 46% and life expectancy rose 12.5%. Infant mortality declined by 17%. ... Had the Gilded Age suffered from monopolistic exploitation, as critics claim, output would have fallen and prices would have risen in the monopolized industries. In a 1985 study, economist Thomas DiLorenzo tested that hypothesis for steel, petroleum, railroads and other industries accused of being monopolistic during the debate on the Sherman Antitrust Act of 1890. He found that output in those industries actually increased by an average of 175% from 1880-90—seven times the growth rate of real GNP. On average, prices in the ostensibly monopolized industries fell three times as fast as the consumer price index.
[1] https://www.census.gov/library/publications/1975/compendia/h...