According to Fred J. Cook, the muckrakers' journalism resulted in litigation or legislation that had a lasting impact, such as the end of Standard Oil's monopoly over the oil industry, the establishment of the Pure Food and Drug Act of 1906, the creation of the first child labor laws in the United States around 1916. Their reports exposed bribery and corruption at the city and state level, as well as in Congress, that led to reforms and changes in election results.