STOCKHOLM — Three researchers who probed the process of business innovation won the Nobel memorial prize in economics Monday for explaining how new products and inventions promote economic growth and human welfare, even as they leave older companies in the dust.

Their work was credited with helping economists better understand how ideas and technology succeed by disrupting established ways — a process as old as steam locomotives replacing horse-drawn wagons and as contemporary as e-commerce shuttering shopping malls.

The award was shared by Dutch-born Joel Mokyr, 79, who is at Northwestern University; Philippe Aghion, 69, who works at the Collège de France and the London School of Economics; and Canadian-born Peter Howitt, 79, who is at Brown University.

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