_Equalization of Productive Powers within the Subgroups._--Not merely must each unit of labor or of capital be able to create as much wealth in one subgroup as in another, but within the subgroup--the specific industry--each unit must be able to create as much under one employer within the industry as under another. The different _entrepreneurs_ must compete with each other on terms of equality, and no one of them must be able to wrest from a rival any part of the rival's patronage. So long as one competitor has an advantage over another in his mode of creating a product, there is no equilibrium within the subgroup. The more efficient user of labor and capital is able to draw away labor and capital from the less efficient one, and the self-seeking impulse which is at the basis of competition impels him to do it. The producer who works at the greater advantage is foreordained to underbid and supplant the one who works under more unfavorable conditions. That a static state may exist and that the movements of labor and capital from point to point may be precluded, every competitor within a subgroup must be able to keep his business intact, hold his customers, and retain in his employment all the labor and the capital that he has. _Equality of Size of Productive Establishments not Necessary._--Size is, as we shall see, an element of efficiency, and the great establishment often sells goods for less than it would cost a small one to make them. The small manufacturer often finds that he would best become a mere merchant, buying some of the products of the great mill and selling them to his customers, rather than continue making similar goods. In the general market an approach to equality of size is usually necessary in order that competitors may be on even terms. This does not preclude the survival of many small establishments. The local retailers have an advantage over great department stores in the filling of small orders. When one has to buy what costs a dollar it does not pay to spend a dime in car-fares, and waste a dollar's worth of time in order to secure the thing for ninety cents. Weariness to customers is here the element that gives to the small producer his advantage and enables him to keep that part of the business which comes in the form of many small orders; but small producers often have other advantages than those which depend on location. In a shop which is more like that of a craftsman of three centuries ago than it is like the great furniture factory, a cabinetmaker can make a single chair of a special pattern more cheaply than the great manufacturer can afford to do it. The great shop requires that there should be many articles of a kind turned out by its elaborate machines in order that the owner should get the benefit of their rapid and unerring action. There will long be at work hand presses much like those used by Benjamin Franklin, besides the complicated automata which do the bulk