Li and van Zanden's 1823-1829 reconstruction of GDP for Huating-Lou (Hua-Lou), a leading locality of China's Yangzi Delta, found Dutch GDP per capita roughly 80 percent higher in silver terms at near price parity, with agriculture near parity but large gaps in industry and services. The authors themselves stressed that this single crisis-decade benchmark could not settle the central question it bears on: the timing and magnitude of any income divergence between the Yangzi Delta (and China) and the leading economies of north-western Europe before 1800. Later work has produced competing national and regional series - Broadberry, Guan and Li's historical national accounts for China 980-1850, new Yangzi Delta agricultural output and wage series - but their estimates of the eighteenth-century Chinese trend and the dating of the divergence remain actively contested (Goldstone 2021; Rawski 2025 and replies). The open problem is a reliable, error-bounded determination of the level and trend of Yangzi Delta and Chinese real income in the eighteenth century, the representativeness of the 1820s benchmark, and the regional-to-national scaling, sufficient to date and measure the pre-1800 divergence.

Background

The 'Great Divergence' denotes the separation, beginning in the late early-modern period, of living standards in north-western Europe from those in the rest of Eurasia, and in particular from China's Yangzi Delta, the most commercially developed region of the Qing empire. Pomeranz's influential 'California School' synthesis (The Great Divergence, 2000) argued that as late as around 1800 the Yangzi Delta and the most advanced European regions were comparable in market development and living standards, so that the divergence was late and owed much to coal and New World resources; older 'Eurocentric' accounts placed the European lead far earlier. Testing such claims requires comparing real income levels across economies with different currencies, price structures, and statistical traditions. The instrument for this is historical national accounting: applying the system of national accounts (SNA, the standard framework of production, income, and expenditure accounts used to compute GDP) to archival sources, and converting the results through a purchasing power parity (PPP) index, which corrects nominal comparisons for differences in the price levels of matched commodity baskets. Li and van Zanden (2012) performed the first such reconstruction for a Chinese region, estimating GDP in 1823-1829 for Huating-Lou (Hua-Lou, the cotton-growing county pair of Huating and Lou near Shanghai, with output valued in taels of silver, roughly 37.3 grams each), and comparing it with the Netherlands on the same accounting basis. Their findings: Hua-Lou GDP per capita of about 24 taels (roughly 895 grams of silver) versus about 1,620 grams for the Netherlands (an 81 percent nominal gap), a purchasing power parity index computed as a Fisher average (the geometric mean of the Laspeyres and Paasche price indices, which compare matched commodity baskets from each country's standpoint) close to parity (99-102), so the real gap resembled the nominal one; agricultural labor productivity was within about 17 percent of the Dutch level, while textiles, transport, and commerce showed Dutch advantages of roughly three-and-a-half to six-and-a-half times the Hua-Lou level, which the authors attributed to differences in relative factor prices - high Dutch wages and cheap Dutch capital inducing labor-saving machinery. Independent real-wage evidence (Allen, Bassino, Ma, Moll-Murata, and van Zanden 2011) likewise placed Yangzi Delta unskilled wages near subsistence, well below north-west European levels. But the 1820s were a decade of cotton-textile crisis and agricultural depression in the Yangzi Delta, and the paper explicitly leaves open whether this benchmark represents earlier eighteenth-century conditions: it cannot establish pre-1820 trends, does not know the ratio between Hua-Lou (or Yangzi Delta) real income and China as a whole (Debin Ma's indicative 40-50 percent Yangzi premium being unverified), and therefore cannot settle the timing and magnitude of any divergence before 1800. Subsequent work has built Chinese national and regional GDP series - most prominently Broadberry, Guan, and Li (2018), covering 980-1850 and incorporating the Hua-Lou benchmark - but their finding that Chinese per capita income declined during the eighteenth century, and the resulting dating of the divergence, have been challenged on data-quality and interpretation grounds in an ongoing exchange (Goldstone 2021; Broadberry 2021; van Zanden and Bolt 2021; Rawski 2025; Broadberry, Guan, and Li 2026).

Problem Statement

Determine, from primary sources and internationally comparable historical-national-accounting methods, the level and trend of real GDP per capita in China's Yangzi Delta during the eighteenth century, and thereby the timing and magnitude of the income divergence between the Yangzi Delta and the leading economies of north-western Europe before 1800. This requires, as jointly supporting and inseparable parts of the same objective: (i) establishing pre-1820 levels and trends of Yangzi Delta output, income, and prices, including whether the 1823-1829 Hua-Lou benchmark (the GDP reconstruction of Li and van Zanden for the paired counties of Huating and Lou near Shanghai) - estimated during a decade of cotton-textile crisis and agricultural depression - understates, matches, or overstates earlier eighteenth-century conditions; (ii) establishing the ratio between Yangzi Delta real income and the Chinese national level (previously only conjectured at a 40-50 percent Yangzi premium from Debin Ma) so regional findings can be scaled nationally; and (iii) quantifying the error bounds of the underlying series tightly enough that the dating and sizing of the pre-1800 divergence - not just a single benchmark comparison - can be stated with defensible confidence against competing European series.

References

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