There are two basic types of metamorphic rocks. Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure.
Image by Picture Taking Fool. Industrial Economics is the study of firms, industries, and markets. It looks at firms of all sizes â from local corner shops to multinational giants such as WalMart or Tesco. And it considers a whole range of industries, such as electricity generation, car production, and restaurants.
Normative Economics. Economists like to distinguish between Positive Economics and Normative Economics. Positive Economics describes how things work. For example, if prices go up, demand will go down. Normative Economics describe what should be. Normative Economics seeks an ideal economic system. When I was training in economics, my teachers all preferred to concentrate on Positive Economics.