STATE AND LOCAL EXPENDITURES 33 minimum, because of duplications in the expenditures for debt service and school purposes. Since these duplications cannot be entirely eliminated from the data, it seems prefer- able to state that the expenditures of local governments other than cities over 30,000 for the five functions may be estimated as between $19 million and $22 million. Expenditures of Cities over 30,000 The combined expenditures of the four Missouri cities having a population of more than 30,000 are shown in Tables 10 and 11 for the fiscal years ended in 1913, 1918, and 1923 to 1928. Table 10 indicates that the net expendi- tures of these cities amounted to $77.0 million for the fiscal year ended in 1928, as compared with $30.2 million for 1913 and $50.6 million for 1923. In other words, net expenditures in 1923 were two thirds larger than in 1913, and the net total for 1928 was more than two and one half times as large as that for 1913. When the amounts expended for interest and public utilities are included, the relation between the totals remains approximately the same, with the exception that the increase from 1923 to 1928 is even more marked. While the population of these cities increased during the period for which data are given, the rate of growth was not proportionate to the increase in total expenditures, and it therefore follows that the per capita cost of city government increased. An expanding urban population frequently is the cause of an increase in per capita expenditures, for addi- tional facilities must be provided for school purposes, streets must be laid out and built as the limits of the city are ex- tended, and adequate sanitation and other facilities provided by government become relatively more expensive. These factors were in evidence throughout the period. Another factor was the improvement of educational standards. Reference to Table 10 shows that, while net expenditures in recent years for all functions were about two and one half times those of 1913, school expenditures were approximately three times as large, amounting to $23.8 mil- lion in 1927 and $21.6 million in 1928. The decrease in 1928 is attributable to a decline in capital outlays for building purposes. Not only did educational expenditures increase