Mark Skousen introduced gross output as an essential macroeconomic tool in his work, "The Structure of Production" in 1990; see also Mark Skousen, "At Last, a Better Economic Measure", "Wall Street Journal" (April 23, 2014). According to Skousen, GO demonstrates that business spending is significantly larger than consumer spending in the economy, and tends to be more volatile than GDP. Earlier-stage and intermediate inputs in GO may also be helpful in forecasting the direction of economic growth. He contends that gross output should be the starting point of national income accounting, and offers a more complete picture of the macro economy. GO can be integrated into macroeconomic analysis and textbook economics, and is more consistent with leading indicators and other macroeconomic data. He makes the case that GO and GDP complement each other as macroeconomic tools and that both should play a vital role in national accounting statistics, much like top line and bottom line accounting are employed to providing a complete picture of quarterly earnings reports of publicly-traded companies.