kwietnia 30
A flow changes a stock over time. Usually we can clearly distinguish inflows (adding to the stock) and outflows (subtracting from the stock). Flows typically are measured over a certain interval of time - eg. the number of births over a day or month. Wealth, as measurable at a date in time, is a stock, like the value of an orchard on December 31 minus debt owed on the orchard. Just as a screwdriver physical capital or a college education human capital can increase productivity. John Dewey may have made the first direct mainstream use of “social capital” in The School and Society in 1899.