Robber barons grew monopolies over their respective industries through a combination of aggressive vertical and horizontal integration strategies.

“Vertical integration” is a modern business phrase that refers to a company taking on multiple stages of production—but John D. Rockefeller pioneered it with his Standard Oil company, employing its own plumbers and handling its own oil transportation.

Many American monopolies popped up during the rapid industrial growth of the Gilded Age. Industries like steel, tobacco, railroads, and telecommunication have all been monopolized at some point in history.

In its later years, Standard Oil formed a business trust that reflected the company's exponential growth. Politicians wanted to prevent such trusts and used the Sherman Antitrust Act to force Standard Oil to break up.

Rockefeller's oil monopoly had a dark side, including cutting oil prices so low that Standard Oil was sometimes temporarily operating at a loss in order to drive competitors out of business.

John D. Rockefeller—the world's first billionaire—once controlled 90% of the US oil refining market, built Standard Oil through vertical integration, and used his fortune to fund universities, museums, and landmarks like Rockefeller Center.

Standard Oil’s impact on the business world can be clearly seen today in oil giants like Exxon and Chevron. But the journey from the Rockefellers’ trust to the modern firms was a windy road. After the Supreme Court ordered Standard Oil’s break up, the first step saw it separate into many state-based companies like Standard Oil of California and the Ohio Oil Company. Visualize it here.

From a young age, John D. Rockefeller knew he was interested in business. He worked as a bookkeeper and sold candy prior to starting the business empire that would help cement the Rockefeller name in history: Standard Oil.

The Rockefellers built one of the most powerful business empires in US history. By the early 1900s, their company, Standard Oil, controlled over 90% of the US oil market.

In the business world, a monopoly exists when one company controls the entire market. Regulators take issue with monopolies because they have been found to limit consumer choices, raise prices, and hurt competition.

When regulators and economists evaluate whether a company constitutes an illegal monopoly, they often consider its overall market share or its relatively high price markups. This piece argues that the Olley-Pakes decomposition is a better measure, identifying whether customers within a market are switching to more productive companies.

Standard Oil was eventually ordered to separate into 34 different entities, and over the following years, those 34 companies merged into what is now called the “Big Four” in the oil industry.

When a few large companies dominate a market, changes in pricing for goods and services affect the entire market. Airlines are a common example of an oligopoly. Because the barrier to entry in the aviation industry is high, only a few airline companies offer the majority of the industry's services. While there is some competition, pricing across the board is largely intertwined and based on other companies' prices.

Hollywood in the early to mid-20th century was largely controlled by the "Big Five" studios: Paramount, Warner Bros., Fox, MGM, and RKO. The studios were vertically integrated, overseeing every aspect of film production, distribution, and exhibition. During this era, actors like Cary Grant and Judy Garland were under contract with specific studios—typically for seven years. Garland signed with MGM at age 13, which counted on them to draw audiences.

Bilateral monopolies are often used to conceptualize labor markets in small towns. Using this concept, large employers have a monopoly over the labor market, while workers have a monopsony as the only available laborers.

The Federal Trade Commission and the US Department of Justice (DOJ) Antitrust Division are the regulatory agencies responsible for overseeing antitrust laws. Before deeming any company a monopoly or acknowledging monopolistic power in a market, the FTC conducts thorough research into market competition, price, and even other competitors' business practices.

This podcast series traces how the US government's approach to regulating big business has changed over a century—from the DOJ's breakup of John D. Rockefeller's Standard Oil monopoly, through lawyer Robert Bork's influence on how courts interpret competition law, to the FTC's modern antitrust lawsuit against Amazon.

An oligopoly is a market structure dominated by a few key suppliers. In the US, as of 2021, just four airlines (Delta, United, Southwest, and American) controlled nearly two-thirds of all domestic flights, making the US airline industry one example of an oligopoly.

True monopolistic companies face no competition, meaning there aren't any near substitutes for the goods or services the company provides. Often, no competition exists because the monopoly is either approved by the government or the barrier to entry is costly.

As a way to reward innovation, the government grants short-term monopolies on patented products. Patents block other companies from producing or selling that product, giving inventors the rights and opportunity to establish themselves in a market before other competitors enter.

Four airlines dominate the US commercial airline industry: Delta, United, Southwest, and American. Many of these large companies secured their top spots in the industry via a series of mergers and acquisitions starting in the 1970s, when American acquired Trans Caribbean Airlines.

In the last half-century, so-called private equity has transformed industries by purchasing private companies, cutting costs, loading up debt, and then selling the business at a premium—all at a huge profit to the investors. Workers, on the other hand, are often left with nothing. Listen to how both pro-worker economists and a private equity stalwart are trying to shift ownership to workers—a growing tactic proven to improve worker satisfaction and company value.

1948's landmark United States v. Paramount Pictures found that the "Big Five" studios violated antitrust laws, effectively ending the reign of the vertically integrated system and the golden age of Hollywood.

The Radio Corporation of America was the biggest stock during the 1920s. Originally called Marconi Wireless, the company transformed radio technology. The company pioneered broadcasting, created NBC, and became a tech giant. After remarkable growth and challenges, RCA was acquired by General Electric in 1986, marking the end of its 67-year independent existence.

These companies became known as the "four horsemen of tech" for the influence the companies had both on other businesses and investors in the late 1990s and early 2000s. The expansion of internet infrastructure throughout the 1990s and the dot-com bubble lifted these companies to incredible heights.

William A. Rockefeller Sr. earned his money via various schemes that included pretending to be a doctor to sell “herbal medicines” and posing as a deaf person to peddle for money.

Although different companies have described focuses ranging from luxury tourism to Martian space colonies, all are building infrastructure to capitalize on the shift away from government-only control and betting big on reusability and scale. By securing public contracts and subsidies, they aim to develop strategic partnerships toward dominance in low Earth orbit.

With Peter Thiel's "Monopoly Theory," the Founders Fund partner argued that investing in companies that create new categories, rather than those that compete with other businesses in existing ones, is a best practice in venture capital.

From the railroad and steel consolidations brokered by John Pierpont Morgan on Wall Street more than a century ago, to the repeal of Glass-Steagall, the financial crisis, and Jamie Dimon’s leadership, J.P. Morgan Chase has been at the center of finance for more than a century.

The venture capital firm that kickstarted an industry.

Under the best circumstances, PE firms can increase a company's value using strategies that might not be suitable for public companies facing pressure for immediate shareholder returns. But PE firms are often portrayed negatively due to the aggressive strategies they sometimes use to cut inefficiencies. As PE has grown, many firms have changed their strategies, shifting away from aggressive scaling to more integrated acquisitions.

After buying bulks of its stock, Buffett then flipped Berkshire Hathaway into the most successful and largest holding company in the world, which owns companies like Geico, Duracell, and Fruit of the Loom.

The Rockefellers created the first known single-family office in the late 1800s but the firm has evolved since to serve many wealthy American families.

The Rockefeller family timeline (as it relates to the business world, at least) starts in 1839 with John D. Rockefeller’s birth. In the nearly 200 years since, his offspring have gotten involved in everything from the Watergate scandal to the McCormick & Company spice business.