Tariffs have become President Donald Trump's favored economic move, prompting a lot of folks to ask what it is they even do.

The lack of clarity about tariffs and other policies could hurt hiring and investing. But the strong U.S. economy should ...

Understanding who will end up paying for the higher costs means understanding how manufacturing, trade and supply chains function — and how costs build along each step of the complex process. Take ...

President Trump wants to ditch the penny, a move that some experts say is long overdue. Advocates of the least-valuable coin say it should stick around. WSJ examines the question of whether or not it ...