Like Carmen Reinhart and Kenneth Rogoff before him, Thomas Piketty has had questions raised about his analysis; in his case, his work on wealth inequality. Though I can’t knowledgeably comment on the questions or the analysis, I can comment on the technology that Ms. Reinhardt, Mr. Rogoff and Mr. Piketty chose to do their work: the spreadsheet. This choice can increase the chances of error in complex analysis, but it also can make finding errors by nonexperts easier.
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