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Summers also claimed that technology was reducing the demand for capital. Digital businesses, such as Facebook and Google, had established dominant global franchises with relatively little invested capital and small workforces. In his book The Zero Marginal Cost Society (2014), the social theorist Jeremy Rifkin heralded the passing of traditional capitalism.16 If the Old Economy was marked by scarcity and declining marginal returns, Rikfin argued that the New Economy was characterized by zero marginal costs, increasing returns to scale and capital-lite ‘sharing’ apps (such as Uber, Lyft, Airbnb, etc.). The demand for capital and interest rates, he said, were set to fall in this ‘economy of abundance’. There was some evidence to support Rifkin’s claims. The balance sheets of US companies showed they were using fewer fixed assets (factories, plant, equipment, etc.) and reporting more ‘intangibles’ – namely, assets derived from patents, intellectual property and merger premiums. In much of the rest of the world, however, the demand for old-fashioned capital remained as strong as ever. After the turn of the century, the developing world exhibited a voracious appetite for industrial commodities that required massive mining investment. China embarked on what was probably the greatest investment boom in history. Before and after 2008, global energy consumption rose steadily. The world’s total investment (relative to GDP) remained in line with its historical average.17 Rifkin’s ‘economy of abundance’ remained a tantalizing speculation.
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