Group VThe Aggregates
The leap from the part to the whole — the economy in aggregate, which behaves like nothing inside it. How large the pie grows, why it lurches, in what unit it is reckoned, and how it divides. What is prudent for the one, here, can be ruinous for the all.
With this group the table changes scale. The first four worked at the level of the part — a single price, a quantity, a failure, an institution. Here we step back to the whole: the economy in aggregate, the sum that obeys none of the rules of its parts. And the founding scandal of the field, the thing macroeconomics exists to explain and has never settled, is exactly that — that the whole is not the sum of its parts.
The fallacy of composition runs through every volume. One worker, by accepting less, can find work; all workers, lowering their wages together, only lower the demand for their own labor. One household grows richer by saving more; a nation that all saves at once may merely shrink its own income, and save no more for the trying. One person can step out of cash before the inflation arrives; everyone cannot. What is prudent for the one is, again and again, ruinous for the all — and the four aggregates are the four faces of that stubborn whole: how large the pie grows over the long run, why it lurches over the short, in what unit it is measured, and how, in the end, it is cut.
The group opens and closes on a single figure: the wage. Its first scandal is the willing worker who cannot find work — a wage that will not clear. Its last question, whether the division between labor and capital is set by productivity or by power, runs, as its own description admits, straight back to The Wage — the table's first volume, and the only one in print. The whole began there; here it returns, at the scale of the nation.
And the honest finding that orders the group is the hardest the table has had to make. This is the least settled province of the discipline: the one where the same data has fit incompatible theories for a century, where the forecasts fail most publicly, where measurement and conviction are most thoroughly entangled. The numéraire of honesty is thinnest exactly where the stakes run highest — over unemployment, inflation, growth, and the division of the whole, on which the discipline's claim to know is at once least secure and most consequential.