From the article by Andrew Sheng and Xiao Geng:
“Indeed, today’s mainstream micro- and macroeconomic models are insufficient for exploring the dynamic and complex interactions among humans, institutions, and nature in our real economy. They fail to answer what Paul Samuelson identified as the key questions for economics – what, how, and for whom are goods and services produced, delivered and sold – and rarely deal with “where” and “when,” either.
The division of economics into macroeconomics (the study of economic performance, structure, behavior, and decision-making at the national, regional, or global level) and microeconomics (the study of resource allocation by households and firms) is fundamentally incomplete and misleading. But there are at least two other divisions in economics that have been neglected: meso-economics and meta-economics.”