After the basis of the war was shown to be rooted in false premises and those who promoted it would face no consequences, he grew depressed and felt that he had "endorsed mass murder".

[7] At Open Markets, he "researched the history of the relationship between concentrated financial power and the Democratic party in the 20th century".

[13] In 2017, Open Markets posted a statement in support of a 4 billion Euro fine given by European regulators to Google and extolling American officials to do similarly.

[7] In 2019, Stoller published the book Goliath: The 100-Year War Between Monopoly Power and Democracy, a history of United States economic policy.

[20][21] Brandeis believed that antitrust action should prevent any one company from maintaining too much power over the economy because monopolies were harmful to innovation, business vitality, and the welfare of workers.

[7] In 2024, he and The American Prospect executive editor David Dayen began a spin-off podcast titled Organized Money.

[7] In a profile of Stoller, Politico described his "dogmatic" belief that the goal of breaking up monopolies is "so central and so urgent that nearly any other cause or political relationship should be sacrificed in service of it".