The central authority is obviously the most suitable body to supervise the process of adjustment. The adjustment to price change should be expressed as a percentage addition to or subtraction from the existing wage. The central authority should be charged with the collection of all necessary price data. This body should then proceed upon the advice of the joint boards or councils in the industries concerned. Unless some strong reason to the contrary exists, however, a uniform policy of adjustment should be pursued--resting upon the following principles. 11.--The conclusions reached in Chapter V in regard to the policy to be pursued in the adjustment of wages to changes in the price level fall into two groups. Firstly, those which have to do with the choice of the basis of calculation of wage adjustments. Secondly, those which have to do with the choice of the actual policy of adjustment during times of rising and falling prices. The same division and order is maintained in the following attempt to sketch out a good plan of adjustment of living wage rates. First, then, these wage rates should be varied in accordance with the movement of a price index number. This index number should represent the prices of all the important commodities produced within the country, but so weighted as to give a defined importance (50 per cent. was suggested) to the prices of those classes of foodstuffs, clothing, housing accommodations, and other commodities upon which the wage earners tend to spend the bulk of their income. It was sufficiently emphasized in the earlier discussion of this subject that this basis of calculation was in the nature of a compromise, and was not beyond criticism. Adjustments should not be undertaken unless the index number of prices has moved at least 5 per cent. (the figure is meant to be merely a suggestion) and adjustment should not be more frequent than twice a year (again a suggestion, only). Secondly, as to the policy of adjustment to be pursued in times of rising and falling price levels, respectively. The policy for a period of rising prices can be very briefly stated. All wage rates prescribed under the living wage policy should be increased by the same percentage as the index number of prices moves upward. There is one case in which this policy cannot be justified theoretically. That is when the increase of prices can be wholly or mainly accounted for by a falling off in the general level of industrial productivity. However, in my opinion, it will be hardly practicable to attempt to distinguish this case from other cases of price increase,--save in an entirely exceptional circumstance, such as a period of war invasion.