what to sell on ebay to make profit 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. In general, the banking sector is healthier. While some banks are struggling, many banks have experienced improvements in operations. The following outstanding banks are chosen as based on eight measures on financial health including net interest margin, return normally equity, nonperforming loans, and reserves as being a percentage of NPLs. Why?