Gentlemen`s agreements were a widespread discriminatory tactic, which would have been more common than restrictive alliances to maintain the homogeneity of upper-class neighborhoods and suburbs in the United States.  The nature of these agreements made it extremely difficult to prove or follow them, and they were long after the U.S. Supreme Court decisions in Shelley/. Kraemer and Barrows v. Jackson.  A source indicates that the gentlemen`s agreements are “probably still in place” but that their use has declined sharply.  This, in some cases, led to gentlemen`s agreements in which Wall Street financiers, such as J.P. Morgan and his “House of Morgan”, would meet with the bureau to obtain prior authorization for mergers and acquisitions. One such example was the gentlemen`s agreement in which regulators and the president ignored the Sherman Antitrust Act, which allowed united States Steel Corp. to become the world`s first multi-billion-dollar company. Gentlemen`s agreements have often been concluded in international trade and international relations, as well as in most industries. Gentlemen`s agreements were particularly prevalent at the birth of the industrial era and well beyond the first half of the 200th year, as regulations often delayed new business practices.
It was found that such agreements were used, among other things, to control prices and limit competition in the steel, iron, water and tobacco industries. A gentleman`s agreement, defined at the beginning of the 20th century as “an agreement between gentlemen who looks at price control,” has been described by one source as the most lax form of a “pool.”  Such agreements have been declared in all industrial sectors and are numerous in the steel and steel industry.  In many cases, the end result may be higher cost or lower quality products for consumers. Worse, a gentlemen`s agreement can be used as a means of promoting discriminatory practices, as in a “network of old boys.” Similarly, in 1907 Morgan again collaborated with Roosevelt to create a gentlemen`s agreement that would allow US Steel to acquire its greatest competitor, Tennessee Coal and Iron, in a tacit and unspoken rule that violated the Sherman Act. Gentlemen`s agreements can also be found in trade agreements and international relations. One example is the 1907 Gentlemen`s Agreement, in which the United States and the Japanese Empire addressed immigration from Japan and the mistreatment of Japanese immigrants to the United States.