Why comparing systems is hard
The previous chapter’s question was definitional; this one is personal. A reader who wonders whether the way things run is the only way that works is really asking whether their own life, transplanted under a different bundle of answers, would have gone better or worse. That question sounds unanswerable, and for most pairs of countries it is. Comparing the United States with the Soviet Union, or Britain with China, compares systems plus climates, histories, wars, resource endowments, and cultures, all at once. Poor performance can always be blamed on the ingredients rather than the recipe.
What the comparison would ideally need is two countries identical in everything except the system: same people, same culture, same geography, same starting point, different bundle. No committee would ever be allowed to run that experiment, and history did not run it either. What the twentieth century produced, once on the Korean peninsula and once across the middle of Germany, is the nearest thing on record: a military line drawn through a single nation, a different bundle installed on each side. Neither case is the controlled experiment it is often advertised as. The halves differed before the lines fell, in ways researchers have since measured, and the honest use of the cases is to name those differences and then ask whether they are large enough to carry the outcome. The answer defended below is that they are not: the measured head starts are counted in tens of percent, and the divergence that followed is counted in multiples (what observational contrasts of this kind can and cannot license is taken up in the closing chapter of Volume V: Pathologies).
One peninsula, two systems
Korea entered its division as one country with one language, one cuisine, and one long history, partitioned in 1945 along a parallel chosen in an evening. One nation, though, is not the same thing as two identical halves, and the halves this line created were not alike. The colonial economy had already pulled them apart: Japanese industrial investment had concentrated in the north, where the coal, the ores, and most of the peninsula’s electrical generating capacity sat, while the south held the rice land and roughly three times the north’s population density. By 1940 the north’s output per person ran about 60% above the south’s, a divergence that began under colonial rule, decades before either system existed (Andersson, López Jerez & Miladinovic, Journal of Institutional Economics, 2023; the Maddison-based anchors in the ledger below put the gap near 45% by 1943, and the multiple moves with source and year while the direction does not). The South, in short, began as the poorer, agrarian, crowded half, and was war-wrecked besides; under an authoritarian government it took the market-coordination route, with a heavy state hand described later in this chapter. The North, holding the head start and the heavy industry, planned comprehensively.
The satellite photograph that NASA publishes of the peninsula at night has become the comparison’s popular summary: the South a lattice of light, the North a dark field with one dim point at Pyongyang. The chart above is the same picture in numbers, with one detail the photograph cannot show: the dark half is the half that started ahead. The comparison does not hold everything constant, and the paragraphs above name what it fails to hold. What it does hold is still remarkable: one people, one language, one peninsula, and an initial gap that favored the side that fell behind. A head start of tens of percent, pointing the wrong way, is hard to recruit as the explanation for a final gap of 26 to one.
What the South chose also needs stating precisely, because the ledger credits the choice, and the choice was not laissez-faire. On the axes of the previous chapter, South Korea through its fast decades paired private ownership and market coordination with a directing state: credit rationed through state-controlled banks toward targeted sectors, managed protection at the border, and support made contingent on performance, above all on export sales, a test no domestic lobby could talk its way past (Amsden, Asia’s Next Giant, 1989; World Bank, The East Asian Miracle, 1993). Firms that met their export targets kept the credit and the licenses; firms that missed lost them. The peninsula’s contrast therefore supports a narrower verdict than the one it is usually asked to carry: market coordination and world-price discipline under disciplined state direction outperformed comprehensive planning. It does not certify the textbook minimal state, which is not what the South ran.
Germany ran it again
The German version ran from 1949 to 1990 with a better-documented finish line. Two states assembled from one industrial nation, the East under planning inside the Soviet bloc, the West a market economy with a broad welfare settlement. Here too the halves were not interchangeable at the start, and the economists who know the case best say so plainly: Becker, Mergele and Woessmann, surveying the evidence in the Journal of Economic Perspectives (2020), conclude that division and reunification “do not provide a straightforward case of a natural experiment.” The prewar East differed from the prewar West in industrial structure and in politics; the occupations were not parallel treatments, Soviet reparations stripping capital out of the East while Marshall aid flowed into the West; and the border stood open until 1961, letting the East’s young and skilled select themselves westward. At the regime’s own finish line the gap was nonetheless a multiple: by the time the GDR collapsed, East German output per person had fallen to less than half of the West’s (Becker, Mergele & Woessmann, Journal of Economic Perspectives, 2020, drawing on Sleifer’s 2006 reconstruction). Figures reported for 1991, about $7,400 per person in the East against about $22,800 in the West (Halle Institute estimates via Pew Research Center, 2019), read wider still, but they belong to the transition rather than the regime: monetary union had arrived a year earlier, and eastern output was collapsing through the changeover. After reunification, East German labor productivity stood near a third of the Western level (Becker, Mergele & Woessmann, 2020). The direction never depends on the method chosen.
The German case adds a detail Korea cannot: exit. Between the end of the war and the Berlin Wall’s closing of the border in 1961, roughly one East German in five left westward, about 875,000 people by 1949 and another 2.75 million after 1950, against a 1946 population near 18 million (Becker, Mergele & Woessmann, 2020): a revealed preference measured in millions of one-way journeys. Performance ledgers rarely include a column for which direction people ran when the door was open; where the data exists, it is one-sided. The same flows read a second way, and both readings are true at once: exit was a verdict on the East, and it was also a treatment applied to it, because the leavers were disproportionately the young and the trained, and every comparison after 1961 scores the population that remained.
The full ledger
Income multiples are the loudest result, and stopping there would flatter the market side of the ledger more than the evidence does. A fair accounting scores several columns, and they do not all point the same way.
Read column by column, the ledger resists a one-line verdict. The income column is not close: both split-country contrasts produced multiples, not percentages, and in both the market half pulled ahead within a generation and never looked back. The health column is genuinely mixed. The Soviet Union took a country whose newborns in 1926 could expect 44 years and delivered roughly 70 by 1964, one of the fastest documented public-health ascents anywhere; the ascent then stopped, and by 1983 the figure had slipped to about 68, a stagnation demographers read as the system’s failure to make the turn from conquering infection to managing chronic disease (Gerontologist, 1985; National Academies, 1997). Cuba’s life expectancy has run close to that of the far richer United States for decades, 78.3 against 78.9 years in 2024 (World Bank, World Development Indicators), with the pandemic years a brief, sharp exception; it is the strongest single entry on the planned side of the page.
The famine column is the darkest, and it needs the most careful reading. The two great planned-economy famines, China’s of 1959–61, where the demographic literature’s estimates span 16.5 to 45 million excess deaths (Meng, Qian & Yared, 2015), and the Soviet famine of 1931–33 with about 5.5 to 6.5 million (Davies & Wheatcroft, 2004), both followed forced procurement and collectivization: the plan did not merely fail to prevent them, it produced them. But the column also holds Bengal in 1943, around 2.1 million deaths under a colonial market economy (Maharatna, 1996), and North Korea’s famine of the 1990s, whose two demographic studies read the toll differently, roughly 600,000 to 1 million excess deaths in the survey-based estimate (Goodkind & West, 2001) against 240,000 to 420,000 in the later census-based reconstruction (Spoorenberg & Schwekendiek, 2012), long after its planning apparatus had decayed. Famine follows the collapse of people’s claims on food under several kinds of regime; the mechanism, and why granaries can be full while people starve, has its own chapter in Volume V: Pathologies.
One column the figure cannot draw is the texture of daily shortage, and no honest ledger of the planned economies omits it. Money incomes in the East were real, but holding money and holding goods were different achievements: the queue, the waiting list, and the connection were where the missing prices reasserted themselves. János Kornai, the Hungarian economist who spent a career inside the system he described, argued in Economics of Shortage (1980) that chronic shortage was the planned economy’s equilibrium rather than its accident: with prices pinned below market levels and enterprises rewarded for output rather than for satisfying buyers, excess demand had nowhere to clear except into time. A market economy meters scarcity in prices; a shortage economy meters it in hours of standing in line, and the hours never appear in the income statistics of either side.
The invention column mostly teaches a measurement lesson. By raw filings, the Soviet patent office led the world in the late 1960s; but the instrument being counted, the inventor’s certificate, vested rights in the state and paid the inventor a bounty, so the count measures a different institution rather than a comparable output (WIPO records; the certificate mechanics are described in the legal literature on Soviet invention law). Market-tested innovation and certificate-counted invention are different quantities, and honest ledgers leave the cell marked rather than forcing a number into it.
What no column settles
Three findings survive all the caveats. System choice moved material outcomes by multiples within one lifetime, across lines that split single nations, and the measured head starts, real as they were, either favored the half that fell behind or are dwarfed by the result: whatever else is uncertain, the contrasts retire the idea that systems are interchangeable dressing over geography and culture. Second, the planned systems’ genuine achievements cluster in what mobilization can deliver: mass vaccination, mass literacy, basic heavy industry, the early health ascent. Their failures cluster where success required decentralized information about what millions of people wanted next. That pattern is too regular to be coincidence, and explaining it is the work of the next chapter. Third, no bundle won every column, which means the ranking of bundles depends partly on how a reader weighs income against security against longevity against freedom to leave; the ledger constrains the argument without ending it.
What the ledger cannot say is why the country a reader happened to be born in sits where it does on the income strip, since most countries were never split and never chose their systems on a clean slate. That question, with border contrasts of its own and the same duty of candor about them, opens Volume III: Countries.