In the case of United States v. American Chicle Company in 1920, the U.S. Supreme Court ruled on a dispute involving taxation and business expenses. The American Chicle Company had been deducting advertising costs as ordinary and necessary business expenses from its gross income to determine taxable income under federal law. However, the government argued that these were capital expenditures which should not be deducted but rather depreciated over time because they provided long-term benefits to the company by increasing brand recognition and customer loyalty. The court sided with American Chicle Company, ruling that advertising is indeed an ordinary expense for businesses like this one whose products are sold directly to consumers through retailers. It stated that such companies need continuous promotion efforts just to maintain their current sales levels due to intense competition in consumer goods markets; thus it's part of their regular operations rather than investments for future growth or improvements. This decision set a precedent allowing businesses more leeway in claiming deductions for promotional activities on their tax returns.

The dissenting opinion in the case of United States v. American Chicle Company argued that the majority's interpretation of Section 2 of the Clayton Act was too broad and could potentially stifle legitimate business practices. The dissent contended that while it is important to prevent anti-competitive behavior, not all price discrimination should be considered illegal per se under this law. They believed that only those acts which lessen competition or create a monopoly should fall under its purview. Furthermore, they expressed concern over how such an expansive reading could impact businesses' ability to offer discounts or other incentives as part of their competitive strategies without fear of legal repercussions. In essence, they feared that such a ruling might inadvertently harm rather than protect market competition.