Lipsey, Robert E. - National Bureau of Economic Research (NBER) - 2006
ratio does not appear to have changed much in the last 50 years. For the US, exports of services have recently been over 40 …% and imports about 20% of exports and imports of goods, a return, for exports to the ratios of the early 1800s. Imports of … services are now increasing more rapidly than exports, but not faster than goods imports. Because measures of service trade are …