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In United States history, the Gilded Age was an era that occurred during the late 19th century, from the 1870s to about 1900. The Gilded Age was an era of rapid economic growth, especially in the Northern United States and the Western United States. As American wages grew much higher than those in Europe, especially for skilled workers, the period saw an influx of millions of European immigrants. The rapid expansion of industrialization led to a real wage growth of 60%, between 1860 and 1890, and spread across the ever-increasing labor force. The average annual wage per industrial worker (including men, women, and children) rose from $380 in 1880, to $564 in 1890, a gain of 48%. Conversely, the Gilded Age was also an era of abject poverty and inequality, as millions of immigrants—many from impoverished regions—poured into the United States, and the high concentration of wealth became more visible and contentious.