Here are entered general works on the amount of money that must be paid for commodities or services. --subdivision Prices under products, objects, etc., and under types of industries where one general subject heading for the products of that industry is lacking, e.g. Concrete--Prices; Construction industry--Prices
--subdivision Supply and demand under occupational groups and types of employees, e.g. Accountants--Supply and demand; Construction industry--Employees--Supply and demand