Borders do not stop every consequence

Borders do not stop every consequence

Sovereignty concerns authority within a territory; interdependence means decisions in one place affect others. Distinguish a claim about legal authority from an explanation of consequences. Shared problems can require coordination even without a world government.

Inspect the case

Teaching upstream state Alder permits a factory to use river water. Downstream state Birch depends on the same river for drinking water and farms.

Teaching measurements: after a dry season, flow falls from 100 to 70 units. Factory use is 10 units; rainfall also fell. No earlier comparison year is supplied.

Both records are original fictional teaching materials. They are not historical primary sources and do not report real participants.

Work through the mechanism

The downstream effect creates a cooperation problem. It does not show that the factory caused the entire 30-unit decline, because rainfall changed too.

Your investigation

A trade commitment is not an observed outcome

A fictional briefing claims: “The average applied rate exceeds the average bound rate, so this schedule must violate its commitments.” Inspect what each average includes before accepting the conclusion. All rates, product labels and imports below are invented; no country is being assessed.

Read the WTO methods and identify the evidence

WTO tariff-profile technical notes, summary methods, checked 29 October 2026: the bound simple average excludes unbound lines; the applied simple average includes applied duties; trade-weighted averages use import flows. The published method pre-aggregates national lines into HS six-digit product groups. This three-product exercise stipulates one line per group, complete data and percentage duties only, so no within-group aggregation or equivalent-rate estimation is needed.

WTO tariff time-series glossary distinguishes bound commitments from applied rates. A bound rate is a scheduled commitment, not the rate necessarily charged. An unbound entry is not a zero-duty commitment. Actual interpretation requires the dated schedule, matching product classification and applicable provisions; this worksheet makes no legal ruling.

MFN means most-favoured-nation treatment. Preferential treatment, exemptions, trade remedies, non-percentage duties, changes in classification and collection records are outside this numerical exercise. It does not reproduce a WTO country profile or calculate actual receipts.

Fictional applied scheduleInitial schedule: 5%, 15%, 30%Contrary schedule: 12%, 2%, 0% Import value mix, in fictional currency units90 / 10 / 0: mostly product A10 / 10 / 80: mostly product C0 / 0 / 0: no recorded imports

Same product classification and period; invented evidence only

Product	Bound rate	Applied rate	Import value	Applied minus bound	Numerically above stated bound?
A	10%	5%	90	-5 percentage points	No
B	20%	15%	10	-5 percentage points	No
C	Explicitly unbound	30%	0	Not defined	No bound comparator

Simple applied mean: (5 + 15 + 30) / 3 = 16.6667%. Simple bound mean: (10 + 20) / 2 = 15%. Product C is excluded from the second denominator, not entered as zero. Binding coverage in this one-line-per-group model: 2/3 = 66.6667%.

Weighted applied mean: sum of (rate × import value) / total import value = 600 / 100 = 6.0000%. Rates are measured in percent, so the result remains a percentage. This numerator is not observed tariff revenue.

Initial audit: explain denominators and name the next record neededCapture audit and settings

Transfer: can a lower average hide a line above its bound?

Load contrary schedule

Compare each line before using the averages. Next, change only the import mix. Predict whether the weighted average can move while every applied rate remains fixed. Explain why a product with zero imports remains in the simple mean, and why an observed low import weight need not establish a low barrier.

Compare the audit and its limits

Initially, the applied mean16.6667% exceeds the bound mean15%, but A and B are each below their bounds; C has no bound comparator. The contrary case reverses the average comparison: applied4.6667% is below15%, yet A is2 percentage points above its stated bound. Averages neither prove nor rule out that line-level discrepancy.

With initial rates fixed, changing imports from90/10/0 to10/10/80 changes the weighted mean from6% to26%; the simple applied mean stays16.6667%. No rate changed. These are stipulated compositions, not an estimated response to policy. A high tariff might discourage imports, so observed import weights can themselves depend on barriers; demand and supply also matter.

Write an evidence request for a real comparison: dated commitments, applied notifications, matching product codes and preferential rules, then collection records for revenue or a separate design for welfare effects. A numerical exceedance is a reason to inspect a record, not an automatic ruling about a member or the legal circumstances.

Revised briefing with contrary evidence and unresolved questions

Copy your tariff evidence report

Read-only JSON report{ "source": "https://www.wto.org/english/res_e/statis_e/daily_update_e/tariff_profiles/TariffProfileTechnicalNotes_E.htm", "audit": { "fictional": true, "scenario": "baseline", "mix": "low", "rows": [ { "id": "A", "applied": 5, "bound": 10, "imports": 90, "gap": -5, "aboveStatedBound": false }, { "id": "B", "applied": 15, "bound": 20, "imports": 10, "gap": -5, "aboveStatedBound": false }, { "id": "C", "applied": 30, "bound": null, "imports": 0, "gap": null, "aboveStatedBound": null } ], "totalImports": 100, "weightedNumerator": 600, "weightedAverage": 6, "simpleApplied": 16.666666666666668, "simpleBound": 15, "boundCount": 2, "totalLines": 3, "bindingCoverage": 66.66666666666667, "exceedances": [], "unbound": [ "C" ], "legalRuling": null, "revenueObserved": null, "welfareEffect": null }, "worksheet": { "draft": "", "captured": null, "revision": "" }, "feedbackSeen": false, "temporary": true, "masteryAssessed": false }

Reset tariff evidence worksheet

Feedback opened this visit: no. Reset restores initial rates and90/10/0 imports and clears writing; exposure remains until reload. Copy temporary work before leaving. No mastery or real-country compliance is certified.

The trade investigation uses authentic institutional methods with invented schedules. Return to the separate fictional river case below: legal authority and observed cross-border consequences likewise require different evidence.

Map actors, authority, cross-border effects and missing evidence. Draft one question each state would need answered before negotiating.

Make a two-column evidence table: what the record directly supports, and what you infer. Use record IDs when connecting observations to claims. Preserve your first interpretation before revising it.

Practice and transfer

Does territorial permission eliminate downstream effects?

Try the practice check in the activity, explain your choice, then apply the idea to this unfamiliar case: Air pollution crosses a border but its sources are uncertain. What comes first?

Limits and responsible interpretation

A fictional river is a model of interdependence, not a legal determination about real borders or treaties.

A successful answer identifies a mechanism and its boundaries. A saved response records practice; it does not automatically establish independent understanding.

Further reading

United Nations: Charter provides disciplinary context. The teaching records above were authored for this lesson and are not quotations from that source.

Choose your depth

High school: Use the supplied records to complete this task: Map actors, authority, cross-border effects and missing evidence. Draft one question each state would need answered before negotiating. Explain your reasoning in a short paragraph or an annotated diagram with a text equivalent.

AP connection: Use this as optional interdisciplinary evidence practice; there is no standalone AP International relations course. Compare two explanations using the supplied records and state a limitation.

Introductory college: Frame a researchable version of the case, document definitions and source selection, and compare the supplied mechanism with a rival explanation. Use the linked disciplinary reading to find one relevant scholarly or institutional source; distinguish that real source from these fictional records. Submit a revision log and methods note.