| The Fed researchers analyzed newspaper articles 
				and corporate earnings calls to estimate trade policy 
				uncertainty, finding it has recently "shot up to levels not seen 
				since the 1970s."
 Other economists, notably Stanford University professor Nicholas 
				Bloom and his colleagues, have documented a similar rise in 
				uncertainty. (For a graphic, please see
				
				https://fingfx.thomsonreuters.com
 /gfx/editorcharts/USA-FED-POWELL-UNCERTAINTY/0H001QEQB7WV
 /index.html )
 
 The Fed researchers then estimated the blow such uncertainty 
				delivers to economic activity, as businesses pull back on 
				investment and production. They concluded that globally and in 
				the United States, its impact is around 1% to GDP.
 
 With U.S. GDP estimated at about $20 trillion, and world GDP at 
				about $85 trillion, a 1% impact would put the drag from trade 
				uncertainty at about $200 billion to U.S. GDP, and $850 billion 
				to global GDP, according to Reuters calculations.
 
 The estimates, the researchers said, are uncertain.
 
 But they are notable in that they are among the first to 
				quantify the large impact of President Donald Trump's approach 
				to trade deals, which he says put the U.S. economy at a global 
				disadvantage.
 
 In an effort to win better trade terms, the Trump administration 
				has jacked up tariffs on hundreds of billions of dollars of 
				Chinese imports and imposed or threatened to impose duties on 
				imports from other trading partners, including Mexico and the 
				European Union. China and other countries in turn have 
				threatened or imposed their own tariffs on U.S. goods.
 
 Trump has called on the Fed to slash U.S. interest rates to 
				support the economy and offset the effects of the trade war.
 
 Fed policymakers for their part have said they will not let 
				politics dictate interest-rate policy. But they have 
				consistently called out the tariffs as detrimental to U.S. 
				growth. Fed Chair Jerome Powell last month cited trade policy 
				uncertainty as an important reason for the global economic 
				slowdown and weak U.S. manufacturing.
 
 Chicago Fed President Charles Evans on Wednesday argued that 
				increased trade tensions could slow U.S. potential growth to 
				1.5% a year, half what Trump said his administration would 
				deliver.
 
 (Reporting by Ann Saphir)
 
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