explain profit motive Historically, the concept of income has first appeared in economics. Adam Smith, in the wealth of nations, defined income as "the amount of consumption that is not eroded by capital", and saw it as an increase in wealth. Later, most economists inherited and developed this view. 1890, ai (Alfred Marshall Maarshell) in its "the principles of economics," the Adam Smith's "wealth increase" enterprise, introduced the concept of earnings, is proposed to distinguish the entity capital and value-added benefits of economic benefits. We’ve been determined to create a more productive conversation and shared vision for improving competitiveness through decarbonisation and energy efficiency – and to get people on all sides to understand one another and be ready to play their part. I want to express my thanks to the British Glass staff who have made this happen.” But the DRAM and NAND semiconductor industries have gone from boom to bust in the face of rising prices and the abundance of falling prices. Will it be any different this time? Or is the need for mobile device memory and disk replacement sufficient to continue to delay the abundance until the foreseeable future? To read more Martin Nettleton adds: “We invested in the campaign to target those larger installation and distribution companies increasingly dissatisfied with the big fabricators who are starting to compete with them by setting up their own networks of trade counters and distribution outlets.