IESET.
Hypotheses·distribution·tax_inequality_china_vat_reform_2016

China's 2016 VAT reform (replacing the business tax on services with VAT, unifying VAT across goods and services with 17/13/11/6 percent rate slabs subsequently consolidated to 13/9/6 in 2019) produced no detectable change in the Chinese disposable-income Gini coefficient vs East-Asia synthetic control over 2016-2020, with the formalisation benefits offsetting the consumption-tax incidence regressivity.

The discriminating test is the synth-control gap on disposable-Gini.

INCONCLUSIVEengine/runs/tax_inequality_china_vat_reform_2016

INCONCLUSIVE_DATA_PENDING — insufficient pre-period coverage (years=8, donors=1)

confidence cueResult card produced; verdict unclassified.

policy briefCoverage too thin

In ordinary language

Over a long period, do more market-oriented institutions translate into higher income or productivity, once the comparison looks beyond a single success story?

plain answer

This test cannot make a firm call yet. insufficient pre-period coverage (years=8, donors=1)

why it matters

Distributional claims often sound morally clear but are empirically complex. This test asks whether the proposed channel explains real differences across places.

how the test works

It compares 7 country or place units from 2005 to 2022, using a synthetic control design, with fixed effects for country and year.

what was measured
What changed
  • Chn vat unification post 2016
What we checked
  • Inequality disposable income
  • Top 10pct pretax income share
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

No evidence packet has been generated yet.

Results

engine/runs/tax_inequality_china_vat_reform_2016
1007550250200520142022CHNKORJPNMYSTHAVNMIDN
illustrative sketch · run pending
No coefficients yet. When the model fires, this chart will show gini_disposable_income across 7 sampled countries over 2005–2022.
The shapes above are stylised — none of the lines are real data.
Placeholder for tax_inequality_china_vat_reform_2016. Published chart will be generated from engine/runs/tax_inequality_china_vat_reform_2016/chart_data.json.

Pre-registration

registration ordering unverified
first-spec commit 4c8ce8e · 2026-07-18T22:11:21Z
run generated · 2026-05-04T12:34:34Z
Run timestamp predates this path's first git-add commit (rebase, rename, or pre-git local run). Spec hash is still the path's first-add commit — not repository HEAD — but ordering is not a clean pre-registration proof.

China's 2016 VAT reform (replacing the business tax on services with VAT, unifying VAT across goods and services with 17/13/11/6 percent rate slabs subsequently consolidated to 13/9/6 in 2019) produced no detectable change in the Chinese disposable-income Gini coefficient vs East-Asia synthetic control over 2016-2020, with the formalisation benefits offsetting the consumption-tax incidence regressivity. The discriminating test is the synth-control gap on disposable-Gini.

Falsification criterion — what would disprove this

set before the run · honoured after

This hypothesis is considered falsified if:

SUPPORTED if Chinese disposable Gini moves less than 0.5 Gini-points in either direction 2016-2020 vs East-Asia synth control at p<0.10. REFUTED if Gini moves more than 1.0 Gini-points in either direction at p<0.10.

formal test & threshold
test:      Synthetic-control with East-Asia donor pool (KOR, JPN, TWN, SGP, MYS, THA, VNM), treated CHN 2016Q2.

Method

Template
synthetic_control
Fixed effects
country, year
Clustering
country
Sample
7 countries · 2005 – 2022
Evidence type
associational

Synthetic-control with East-Asia donor pool. Treated CHN 2016Q2.

Data

VariableSourceTransform
gini_disposable_income
outcome
world_bank_wdi:SI.POV.GINItier 2
level
top_10pct_pretax_income_share
outcome
owid:top-10-share-of-total-incometier 2
level
chn_vat_unification_post_2016
treatment
constructed:indicator = 1 for CHN, year >= 2016tier 5
indicator
log_real_gdp_per_capita
control
world_bank_wdi:NY.GDP.PCAP.KDtier 2
log
trade_openness
control
world_bank_wdi:NE.TRD.GNFS.ZStier 2
level

● ready  · ● pending  · ● reconstruct-needed

Detailed result card

Result card — tax_inequality_china_vat_reform_2016

Verdict: INCONCLUSIVE_DATA_PENDING — insufficient pre-period coverage (years=8, donors=1)

Pre-registration

  • Claim: China's 2016 VAT reform (replacing the business tax on services with VAT, unifying VAT across goods and services with 17/13/11/6 percent rate slabs subsequently consolidated to 13/9/6 in 2019) produced no detectable change in the Chinese disposable-income Gini coefficient vs East-Asia synthetic control over 2016-2020, with the formalisation benefits offsetting the consumption-tax incidence regressivity. The discriminating test is the synth-control gap on disposable-Gini.
  • Falsification rule: SUPPORTED if Chinese disposable Gini moves less than 0.5 Gini-points in either direction 2016-2020 vs East-Asia synth control at p<0.10. REFUTED if Gini moves more than 1.0 Gini-points in either direction at p<0.10.

Synthetic-control estimate

  • Error: insufficient pre-period coverage (years=8, donors=1)

Variables resolved

  • world_bank_wdi:SI.POV.GINI → gini_disposable_income (outcome, n=2430)
  • owid:top-10-share-of-total-income → top_10pct_pretax_income_share (outcome, n=3294)
  • constructed: indicator = 1 for CHN, year >= 2016 → chn_vat_unification_post_2016 (treatment, n=126)
  • world_bank_wdi:NY.GDP.PCAP.KD → log_real_gdp_per_capita (controls, n=14066)
  • world_bank_wdi:NE.TRD.GNFS.ZS → trade_openness (controls, n=10714)

Generated by scripts/run_synth_did.py at 2026-05-04T12:34:34+00:00

Notes

Tax-inequality candidate, swarm-S6 batch 6. Tests the formalisation- vs-incidence hypothesis for VAT distributional effects.

Authored framework. Read the transparency note.