Ruchir Sharma’s “The Emerging-​​Market Come­down” (op-​​ed, Jan. 22) is a useful anti­dote to all the hype about emerging economies, but he is wrong to assert that incomes in poor coun­tries aren’t grad­u­ally con­verging with those of rich coun­tries. Econ­o­mist Angus Maddison’s work has shown that since emerging economies gained inde­pen­dence, and espe­cially after they embraced glob­al­iza­tion in the 1980s and 1990s, their incomes have been rising faster than that of rich coun­tries. Mr. Sharma’s point that all emerging mar­kets haven’t grown at a high clip all the time is true—but hardly damning. He is also right that poor coun­tries highly depen­dent on natural-​​resource exports grow less con­sis­tently, but the majority of poor coun­tries, including China and India, aren’t in that situation.

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