294 THE FISCAL PROBLEM IN MISSOURI an important variable, and, unless a comparison of property tax burdens! were included, it would not be possible even to approach the question of total tax burdens. Sales value as an indicator of the value of manufacturing properties is practically useless, as has been pointed out previously, and, unless facilities were available for determining the general property tax rates on true value in the manner indicated, any conclusions that might be derived would have little value. This analysis represents little more than an approach to the problem of comparative tax burdens on manufacturing corporations. It is not known that any analysis of the prob- lem in the manner indicated has ever been made, and, until data resulting from an analysis of property tax burdens on manufacturing plants producing competitive products are available, the problem of comparative tax burdens on manu- facturing corporations in the several states must in large part remain unsolved. The same applies to corporations in other lines than manufacturing, although in certain lines the value of the tangible property assessable would be pro- portionately much less than for manufacturing corporations. Although there are no data which can be used to compare the income of corporations derived in Missouri and total state and local taxes on corporations in Missouri, there is one aspect of taxes paid by corporations that deserves men- tion. For the calendar year 1928, the federal corporation income.taxes collected in Missouri amounted to a little less than $34 million. To what extent this figure might be altered, if allowance were made for taxes on income of cor- porations reporting from Missouri derived from other states and taxes paid by corporations in other states on income derived from within Missouri, it is difficult to say. It would seem safe to conclude, however, that Missouri and other corporations contributed between $30 million and $40 mil- lion to the Federal Government on account of taxes on in- come derived within Missouri. If the variable factors could be eliminated and it were found that the federal corporation ! General property taxes paid in relation to income would represent only one ap- proach to the problem. Since income varies both as to time and place, the rates on true value would have to be determined before absolute comparisons could be made.