Econ 101: Trade balance

Everyone understands that we are each wealthier if we buy most of what we consume from others and pay for it with what we specialize in producing ourselves. But at dinner last night one of our guests (Chatham House Rules prevent me from revealing his identity) asked how we can compete with China when their workers are so cheap? The teacher in me rises up to unpack this statement and the related issue of trade balance. It is both complicated and simple.

1. Are Chinese goods cheaper? Chinese workers are paid in their currency (RMB) and American’s buy China’s output in our currency (USD). If an LED light bulb made in China is sold for 140 RMB is that cheap for American’s? If the exchange rate of RMB for USD is 4 RMB per USD it will cost us $35 per bulb (expensive), but if the exchange rate is 10 RMB per USD it will cost us $14 per bulb (cheap).
2. So will we buy everything from China? What will the Chinese do with the dollars they receive from exporting to us? They might buy goods from the US (made by workers who used to make LED light bulbs). If the exchange rate is “right”, the Chinese will spend all of those export dollars on imported US products. Trade (imports and exports) will balance.  An exchange rate that makes dollars more expensive in China (RMB cheaper in the US) will decrease China’s imports from the US relative to its exports (a Chinese trade surplus). What will they do with the remaining dollars held in China?
3. What happens with Chinese trade surplus holding of USD? The Chinese can invest them in the US (buy US Treasury securities, stocks, property, etc.). Or sell them for their own currency driving the exchange rate of RMB for USD down (or up depending on what you put in the denominator). The reduced cost in China of US goods will increase Chinese imports and the higher cost of Chinese good in the US will reduce US imports from China. The Chinese trade surplus (US trade deficit) will vanish (or adjust to the rate of capital flow desired by cross border investors). The incomes of Chinese and American workers will be higher because each will be producing the goods for which they each have a comparative advantage (the win-win of free trade).
4. Exchange rate manipulation or production subsidies distort the outcome. EU tariffs on Chinese EVs are explicitly set at a level to compensate for Chinese government subsidies of EVs. This is allowed by WTO trade rules to put Chinese and German car manufacturers on a fair, competitive basis. The US’s much higher tariff on Chinese EVs makes no mention of complying with WTO rules (the US again does whatever it wants to the detriment of the global trading system).
5. Trade balance between US and China is used as a simplification. What matters is the balance between each country and the rest of the world but distilling the world into two countries simplifies the discussion.
6. Time for the dessert.

Author: Warren Coats

I specialize in advising central banks on monetary policy and the development of the capacity to formulate and implement monetary policy.  I joined the International Monetary Fund in 1975 from which I retired in 2003 as Assistant Director of the Monetary and Financial Systems Department. While at the IMF I led or participated in missions to the central banks of over twenty countries (including Afghanistan, Bosnia, Croatia, Egypt, Iraq, Israel, Kazakhstan, Kenya, Kosovo, Kyrgystan, Moldova, Serbia, Turkey, West Bank and Gaza Strip, and Zimbabwe) and was seconded as a visiting economist to the Board of Governors of the Federal Reserve System (1979-80), and to the World Bank's World Development Report team in 1989.  After retirement from the IMF I was a member of the Board of the Cayman Islands Monetary Authority from 2003-10 and of the editorial board of the Cayman Financial Review from 2010-2017.  Prior to joining the IMF I was Assistant Prof of Economics at UVa from 1970-75.  I am currently a fellow of Johns Hopkins Krieger School of Arts and Sciences, Institute for Applied Economics, Global Health, and the Study of Business Enterprise.  In March 2019 Central Banking Journal awarded me for my “Outstanding Contribution for Capacity Building.”  My recent books are One Currency for Bosnia: Creating the Central Bank of Bosnia and Herzegovina; My Travels in the Former Soviet Union; My Travels to Afghanistan; My Travels to Jerusalem; and My Travels to Baghdad. I have a BA in Economics from the UC Berkeley and a PhD in Economics from the University of Chicago. My dissertation committee was chaired by Milton Friedman and included Robert J. Gordon. I live in National Landing Va 22202 View all posts by Warren Coats