Research & insights

Source-backed reporting, original comparisons and practical analysis across our eight subject areas.

October 20, 2026 · Business & Industry

A mean is not a buffer policy. LEAD TIME: Define the start and usable-receipt event. EXPOSURE: Measure demand over the protection window. OBJECTIVE: State the service measure and constraints. Original explanatory diagram.

Why Average Lead Time Is Not Enough for an Inventory Buffer

Compare suppliers with equal average lead times and different variability, then define the demand window and service objective for an inventory buffer.

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October 20, 2026 · Countries & Cities

An anomaly needs its reference. OBSERVATION: What was measured, where and when? BASELINE: Which reference value and period? ANOMALY: What departure and unit are reported? Original explanatory diagram.

Climate Anomalies: The Baseline Is Part of the Number

Read climate anomalies with their reference periods and units, using an example that separates a baseline change from a physical change.

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October 20, 2026 · Economy & Finance

Choose the GDP measure for the question. COMPOSITION: Use a compatible current-dollar account. REAL GROWTH: Use the appropriate quantity-growth measure. CONTRIBUTION: Use the published aggregation method. Original explanatory diagram.

Why Chained-Dollar GDP Components Do Not Simply Add Up

Learn why chained-dollar GDP components are not generally additive and how to avoid misleading shares or contribution calculations.

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October 20, 2026 · Technology & AI

Weights are one memory component. RAW WEIGHTS: Parameters × bits ÷ 8 is a limited estimate. RUNTIME: Caches, activations and buffers need space too. QUALITY: Task acceptance requires a separate evaluation. Original explanatory diagram.

Quantization: Smaller Model Weights Do Not Tell the Whole Memory Story

Calculate raw model-weight memory, then separate quantization savings from runtime overhead, hardware support and task-quality testing.

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October 20, 2026 · Business & Industry

Compare alternatives, not labels. INCREMENTAL: Which future amounts change? UNCHANGED: Which allocated costs remain the same? OPPORTUNITY: What credible alternative is forgone? Original explanatory diagram.

Allocated Cost and Incremental Cost Answer Different Decisions

Compare allocated and incremental costs with a transparent special-order example, including avoidability, capacity and opportunity cost.

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October 20, 2026 · Countries & Cities

Power multiplied by time gives energy. CAPACITY: MW describes a power capability or rate. DURATION: Hours define the selected observation window. GENERATION: MWh records energy over that window. Original explanatory diagram.

Electricity Capacity and Generation: Compare Power with Energy

Compare electricity capacity and generation using the right units, observation periods and a clearly labeled capacity-factor example.

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October 19, 2026 · Economy & Finance

Two perspectives on production. GDP: Expenditure-side estimate. GDI: Income-side estimate. DISCREPANCY: Measured GDP minus measured GDI. Original explanatory diagram.

GDP and GDI: Two Measurements of the Same Economy Can Differ

Understand why measured GDP and GDI differ, how the statistical discrepancy is defined, and which comparisons need matching periods and vintages.

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October 19, 2026 · Technology & AI

Similarity and probability differ. GEOMETRY: Cosine compares vector directions. RANKING: A score can order candidates for inspection. CALIBRATION: Probability claims need outcome evidence. Original explanatory diagram.

Why a Cosine Similarity Score Is Not a Probability

See why cosine similarity measures vector direction rather than a probability, using a transparent example for AI retrieval scores.

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October 19, 2026 · Healthcare & Public Data

Compare the construct before the percentage. INTERVIEW: What did the respondent report? EXAMINATION: What did the protocol measure? COMPARABILITY: Do population and time definitions match? Original explanatory diagram.

Reported and Measured Health Data: Compare the Method Before the Percentage

Compare reported and measured health indicators by their questions, examination protocols, populations and reference periods before comparing percentages.

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October 19, 2026 · Sports & Statistics