Stephanie Kelton, a professor at the State University of New York at Stony Brook, is a leading advocate for Modern Monetary Theory who is known for her seemingly radical argument that as long as a government can pay back its debt in the nation’s own currency, there are no limits to the fiscal deficits that it can incur. She stirred up a controversy when she cited Japan’s situation as evidence to prove her theory.

A stereotypical criticism of MMT is that inflation will rise if fiscal deficit expands in an uncontrolled manner. As a rebuttal to this criticism, Kelton pointed out that Japan has no inflation at all even as its budget deficit accumulates every year and the balance of government debt tops 200 percent of the nation’s GDP.

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