John Charles is a researcher and data analyst based in Westbrook, Maine. He designs surveys, builds statistical models, and writes about the numbers behind investing and public data.
He is the author of Statistics and Data Analysis for Investing and Trading, a practical guide to the statistics investors actually use. He built the Maineblock studios, and he runs Maine Mood, a running survey of how Maine feels about the economy and daily life.
Every post on this blog is published by Maineblock and reviewed by John Charles before it appears. The review covers the figures, the methods, and the claims, and the corrections page records any fix made after publication.
His Work
Statistics and Data Analysis for Investing and Trading
The book: the statistics investors actually use, with worked examples throughout.
See the BookStock Valuation Studio
Free in the browser: a fair value, a buy price, and the full workup for listed companies.
OpenAnalysis Studio
Advanced analytics, right in your browser. Weighting, regression, survival analysis, and more, on your own data.
OpenSAE Studio
Small area estimation on your own data, in the browser: Fay-Herriot models with benchmarking and exports.
OpenMaine Mood
A running survey of how Maine feels about the economy, work, and daily life, with published results.
OpenAbout Maineblock
More about Maineblock, and how to get in touch.
Open