The Robinson-Patman Act was passed in 1936, but the federal government stopped enforcing it during the deregulation of the 1980s. The FTC resumed its enforcement in December when it sued Southern Glazer’s, the largest U.S. distributor of wine and spirits.

A lawsuit filed by the Federal Trade Commission alleges that food and beverage maker PepsiCo engaged in illegal price discrimination by giving unfair price advantages to one big-box retailer.

The Federal Trade Commission is suing Pepsi, alleging it has rigged competition by offering unfair pricing deals to a big retailer at the expense of smaller rivals, resulting in higher costs for shoppers.

The U.S. Federal Trade Commission sued Pepsi on Friday for offering preferential pricing to a larger retailer, whom a source familiar with the matter confirmed was Walmart. The practices fed high consumer prices by leaving other retailers,