Energy is one of the most interesting aspects of the U.S. balance of payments account. Higher energy production in the U.S. is transforming the nation's trade relationship with the rest of the world.The global economy is strong. The U.S. Commerce Department released the March trade data today, which shows the trade deficit decreased 3.6 percent in March to $40.4 billion. February's trade deficit had been the largest in five months, but much of that was due to severe weather with production shutdowns and transportation problems. The same situation faced the economy in January, and the trade deficit was a drag on gross domestic product (GDP) growth.There are four basic components of GDP calculation: consumption, investment, government spendin...