When more women workers entered the market in the 20th Century, well, it caused the supply curve to shift to the right and vice versa.
A positive change in supply where demand constantly shifts the supply curve to the right, resulting in a cross producing lower prices and higher value.
A negative change in supply, on the other hand, moves the curve to the left, causing prices to increase and the value to decrease.
Thus, In the second half of the 20th century more women entered the labor market. that caused a shift in the labor supply curve in many industries to shift to the right.
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