(i) Stock as they are related to a point of time(ii) Flow as losses are measured over a period of time(iii) Flow as production is measured over a period of time(iv) Flow as profit is measured over a period of time(v) Stock as population is related to a point of time(vi) Stock as it is related to a point of time(vii) Flow as savings are related to a period of time(viii) Flow as national income is related to a period of time(ix) Stock as capital is related to a point of time(x) Flow as ti is related to a period of time.(xi) stock as it is related to a point of time(xii) Stock as it is related to a point of time(xiii) Flow as production is measured over a point of time(xv) Flow as gross domestic product is measured over a period of time