Twenty years after the introduction of the theory, we revisit what it does—and doesn’t—explain. by Clayton M. Christensen, Michael E. Raynor and Rory McDonald Please enjoy this HBR Classic. Clayton M.

Jason Fernando is a professional investor and writer who enjoys tackling and communicating complex business and financial problems. Andy Smith is a Certified Financial Planner (CFP®), licensed realtor ...

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Andrew Bloomenthal has 20+ years of editorial experience as a financial journalist and as a financial services marketing writer. Charlene Rhinehart is a CPA , CFE, chair of an Illinois CPA Society ...