A government report traces the economy's stagnation in the last fifteen months to massive declines in spending on commercial construction, while residential construction grew at only half the pace of previous recoveries. Of recent note, however, is a fall in inventories.
a. In which category or categories of the national expenditure accounts, C, I, G, or X, would these spendings be recorded?
b. Does the fall in inventories appear in the accounts as a positive or a negative number? Why?