IESET.
Hypotheses·trade·trade_lib_china_wto_2001_manufacturing_export_surge

China's WTO accession (2001-12-11) triggered a structural acceleration in Chinese merchandise-export intensity and manufacturing value-added relative to a synthetic-control donor pool of large emerging economies that did not accede to the WTO on the same date.

The post-2001 export boom is one of the most consequential trade-liberalisation episodes in recorded economic history; this spec tests whether it is detectable as a pre/post structural break in WDI national-accounts and trade-share data, not whether the boom raised aggregate growth (already covered by china_deng_reform_growth_acceleration_1978).

PARTIALengine/runs/trade_lib_china_wto_2001_manufacturing_export_surge

PARTIAL — mean_gap=+4.793, |gap|/pre_sd=2.3, p_perm=0.833 (gap below 0.5×pre_sd or placebo p≥0.10)

confidence cueThe result is useful, but not decisive. Treat it as a clue, not a settled conclusion.

policy briefMixed or noisy

In ordinary language

When countries open more of the economy to trade and competition, do people end up with better long-run income or productivity outcomes?

plain answer

The evidence is suggestive but not decisive. mean_gap=+4.793, |gap|/pre_sd=2.3, p_perm=0.833 (gap below 0.5×pre_sd or placebo p≥0.10)

why it matters

This matters because trade claims should change belief only when they survive a pre-declared empirical test.

how the test works

It compares 12 country or place units from 1990 to 2019, using a synthetic control design.

what was measured
What changed
  • Wto accession indicator
What we checked
  • Merchandise exports pct income
  • Log manufacturing value added
  • Trade openness pct income
what this does not prove

A single test is not the whole truth. It narrows the claim under a specific sample, time period, and method. Strong policy conclusions need the pattern to survive nearby tests, alternative data, and serious objections.

verification

6 input datasets, 0 unresolved missing series, provenance status: reproducible hash verified.

Results

engine/runs/trade_lib_china_wto_2001_manufacturing_export_surge
1007550250199020052019CHNINDIDNBRAMEXRUSTUR
illustrative sketch · run pending
No coefficients yet. When the model fires, this chart will show merchandise_exports_pct_gdp across 12 sampled countries over 1990–2019.
The shapes above are stylised — none of the lines are real data.
Placeholder for trade_lib_china_wto_2001_manufacturing_export_surge. Published chart will be generated from engine/runs/trade_lib_china_wto_2001_manufacturing_export_surge/chart_data.json.

Pre-registration

pre-registered
first-spec commit 098ce96 · 2026-04-30T12:57:33Z
run generated · 2026-05-15T17:29:26Z

China's WTO accession (2001-12-11) triggered a structural acceleration in Chinese merchandise-export intensity and manufacturing value-added relative to a synthetic-control donor pool of large emerging economies that did not accede to the WTO on the same date. The post-2001 export boom is one of the most consequential trade-liberalisation episodes in recorded economic history; this spec tests whether it is detectable as a pre/post structural break in WDI national-accounts and trade-share data, not whether the boom raised aggregate growth (already covered by china_deng_reform_growth_acceleration_1978).

Falsification criterion — what would disprove this

set before the run · honoured after

This hypothesis is considered falsified if:

SUPPORTED if SC gap on merchandise-exports-share-of-GDP exceeds +10 percentage points by 2007 AND SC gap on log manufacturing value-added exceeds +0.30 (≈35% level gap) by 2010. PARTIAL if only one holds. REFUTED if China under-performs the synthetic on both metrics — would indicate a serious data or identification failure given the strength of the consensus historical pattern.

formal test & threshold
test:      synthetic_control_china_vs_em_donor_pool
threshold: PRIMARY: SC_gap(merchandise_exports_share, 2007) >= 10 pp AND SC_gap(log_manufacturing_va, 2010) >= 0.30. METHOD_VALID: WDI series available 1990-2019 for all donor pool members.

Method

Template
synthetic_control
Clustering
country
Sample
12 countries · 1990 – 2019
Evidence type
causal

Synthetic-control estimator for China against a donor pool of large emerging economies. Pre-treatment fitting window 1990-2001; post-treatment evaluation 2002-2019. Placebo permutation across donor pool. Robustness: drop the 2008-2009 GFC years from the post-window.

Data

VariableSourceTransform
merchandise_exports_pct_gdp
outcome
world_bank_wdi:NE.EXP.GNFS.ZStier 2
level
log_manufacturing_value_added
outcome
world_bank_wdi:NV.IND.MANF.KDtier 2
log
trade_openness_pct_gdp
outcome
world_bank_wdi:NE.TRD.GNFS.ZStier 2
level
wto_accession_indicator
treatment
constructed:indicator = 1 for CHN from 2002 onward; 0 elsewheretier 5
indicator
log_gdp_pc_pretreatment
control
world_bank_wdi:NY.GDP.PCAP.KDtier 2
log_level_at_treatment_minus_1
investment_share
control
world_bank_wdi:NE.GDI.TOTL.ZStier 2
level
fdi_inflows_pct_gdp
control
world_bank_wdi:BX.KLT.DINV.WD.GD.ZStier 2
level

● ready  · ● pending  · ● reconstruct-needed

Detailed result card

Result card — trade_lib_china_wto_2001_manufacturing_export_surge

Verdict: PARTIAL — mean_gap=+4.793, |gap|/pre_sd=2.3, p_perm=0.833 (gap below 0.5×pre_sd or placebo p≥0.10)

Pre-registration

  • Claim: China's WTO accession (2001-12-11) triggered a structural acceleration in Chinese merchandise-export intensity and manufacturing value-added relative to a synthetic-control donor pool of large emerging economies that did not accede to the WTO on the same date. The post-2001 export boom is one of the most consequential trade-liberalisation episodes in recorded economic history; this spec tests whether it is detectable as a pre/post structural break in WDI national-accounts and trade-share data, not whether the boom raised aggregate growth (already covered by china_deng_reform_growth_acceleration_1978).
  • Falsification rule: SUPPORTED if SC gap on merchandise-exports-share-of-GDP exceeds +10 percentage points by 2007 AND SC gap on log manufacturing value-added exceeds +0.30 (≈35% level gap) by 2010. PARTIAL if only one holds. REFUTED if China under-performs the synthetic on both metrics — would indicate a serious data or identification failure given the strength of the consensus historical pattern.

Synthetic-control estimate

  • shape: synth_did
  • treated_country: CHN
  • event_year: 2001
  • n_donors: 11
  • donor_weights (top): {'IND': 0.4814, 'TUR': 0.2663, 'BRA': 0.1875, 'ZAF': 0.0649, 'IDN': 0.0}
  • pre_rmse: 4.767885638156413
  • pre_period_sd: 2.1019876973812206
  • mean_post_gap: 4.7925981343694
  • end_period_gap: -4.136086978341421
  • post_period_years: [2001, 2019]
  • placebo_p_value: 0.8333333333333334
  • n_placebos: 11
  • method: synthetic-control via NNLS, permutation inference

Variables resolved

  • world_bank_wdi:NE.EXP.GNFS.ZS → merchandise_exports_pct_gdp (outcome, n=10904)
  • world_bank_wdi:NV.IND.MANF.KD → log_manufacturing_value_added (outcome, n=8624)
  • world_bank_wdi:NE.TRD.GNFS.ZS → trade_openness_pct_gdp (outcome, n=10714)
  • constructed: indicator = 1 for CHN from 2002 onward; 0 elsewhere → wto_accession_indicator (treatment, n=360)
  • world_bank_wdi:NY.GDP.PCAP.KD → log_gdp_pc_pretreatment (controls, n=14066)
  • world_bank_wdi:NE.GDI.TOTL.ZS → investment_share (controls, n=10428)
  • world_bank_wdi:BX.KLT.DINV.WD.GD.ZS → fdi_inflows_pct_gdp (controls, n=11580)

Generated by scripts/run_synth_did.py at 2026-05-15T17:29:26+00:00

Strongest opposing argument

Every hypothesis ships with its charitable opposing argument. The framework earns credibility by handling objections at their strongest, not weakest.

Notes

Framework-validation tier. If the synthetic-control estimator fails to detect this episode, something is wrong with the data pipeline or estimator implementation.

Authored framework. Read the transparency note.