The adamson act, which legislated working hours and pay in the railroad industry, was significant because

it blazed a trail for similar policies in other industries.

Explanation:

The Adamson Act was a law passed in 1916 to prevent workers on the interstate railroad from being abused with hours of inhumane and exhausting work, so the law required workers to work only 8 hours a day and if it were necessary to work longer, they should receive an additional wage. This law was of extreme importance in the United States, because through it, other companies began to be forced to establish the working day of 8 hours a day.

entering that problem on the tube you may come up with an answer

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.