There are a number of alternative policies that might be pursued in order to ensure that the use of different bases of assessment for the living wage for men and women should not lead to haphazard displacement of men by women. Justice Brown in the Printing Trades Case has called attention to the most important of them. "... I suggest," he writes, "that with respect to any industry or grade, where the prima facie formula above (that is, a different living wage for men and women) is challenged, evidence should be given to show that it is desirable, having in view the interests of all parties and of the community, that men should be retained in that industry or grade even though such retention might involve some departure from the formula in question. Where such evidence is satisfactory there are several alternatives open to an industrial court. (1) To fix the same wage for women as for men. (2) To fix a ratio wage where it is proved to the satisfaction of the Court that the average woman is not of equal value to the employer. (3) To exclude women. (4) To accept the prima facie mode of assessment, but to limit the proportion of women who may be employed by any particular employer in any particular industry or grade.... The task of choosing may often be one of extreme difficulty and delicacy."[131] The task of fixing the relation between men's wages and women's wages will be even more delicate when the introduction of women into a field of employment follows upon a modification of the processes of production involved.[132] As was said above, to give advice upon the question of the relation between men's wages and women's wages, should be one of the duties of the joint boards or councils in the various industries. The course to be pursued should be decided upon by balancing all of the interests involved. It is to be desired that the same policy be pursued throughout all industries or occupations rather than divergent ones, and the central authority should strive to attain unity of policy. 10.--The complications introduced into the administration of the living wage principle by changes in the general price level have yet to be dealt with. It has been seen that changes in the general price level affect the outcome of distribution and, for that reason, any policy of wage settlement must include provision for the adjustment of wages to price changes. We have now to consider how this adjustment can best be carried out.