Analysis
How to evaluate an alternative data vendor: a working checklist
Point-in-time integrity, provenance, history depth and decay tests — the questions that separate a signal from a spreadsheet.
Author
Sofia Lindqvist
Independent editorial contributor covering investment strategy and financial modeling for VUGA Network publications.
Articles by Sofia Lindqvist
Analysis
What regime-detection models can and cannot do
Hidden Markov and clustering models summarize states that already happened — timely labeling of live regimes is the hard, partly unsolved part.
Economy
What do consumer confidence surveys actually measure?
Two surveys, different questions and timing — and a documented gap between sentiment and spending that is the finding, not a flaw.
Analysis
Feature importance is not causation: the mixer problem
Importance scores measure a model's reliance on inputs under correlations — a variable your model ranks first may only be standing in for the real driver.
Investing
Dividend yield or total return: which number answers your question?
The two statistics differ by construction — one prices income against price, the other measures everything — and confusing them misprices risk.