Primers
From AltData.wiki, The Alternative Data Encyclopedia
What is alternative data?
A plain-English introduction to alternative data: what it is, why investors pay for it, and the main signal families.How funds evaluate alternative data vendors
The checklist data sourcing teams run before licensing a dataset: history, coverage, point-in-time, delivery and compliance.Job postings as an investment signal
Why hiring data predicts revenue, how funds use it, and what to look for in a job-postings dataset.Card transaction panels explained
How anonymized payment panels approximate company revenue, and the caveats buyers must weigh.Delivery formats: API, S3, Snowflake, Parquet
How alternative data actually reaches a fund's stack, and which format fits each stage of evaluation.Open vs commercial alternative data
Where free datasets end and paid feeds begin — and how to use open data to de-risk a commercial license. 
