Three posts a week, each one reviewed before it publishes. Mondays bring statistics for investors. Wednesdays alternate valuation with survey research and analysis how-to. Fridays alternate small area estimation with Maine by the numbers.
Latest Posts
Posts Begin November 9, 2026
The first posts begin on Monday, November 9, 2026. New posts appear here as they publish, three a week.
The Five Pillars
Statistics for Investors
The statistics behind investing, worked on real data: averages that mislead, risk measures and their limits, and what backtests can and cannot show.
Browse the PillarValuation
Company valuation with the arithmetic shown: discounted cash flow, multiples, and the assumptions that move the answer.
Browse the PillarSurvey Research and Analysis How-To
How surveys are weighted, adjusted, and read, with step-by-step analysis methods for SPSS, Python, and the browser.
Browse the PillarSmall Area Estimation
Estimates for counties, towns, and other small places, where direct survey numbers run too thin to stand on their own.
Browse the PillarMaine by the Numbers
Maine in data: population, work, housing, and health, county by county, from public sources.
Browse the PillarFree Resources
Sample Size Worksheet
A working spreadsheet for survey sample size: margins of error, design effects, and response rates, with the formulas in the cells.
Free DownloadInvestor Statistics Cheat Sheet
A one-page reference for the statistics investors use most, with the formulas and worked figures.
Free DownloadTemplates
Every Maineblock workbook and checklist in one place: the free downloads and the premium products.
Browse TemplatesAbout This Blog
Posts are published by Maineblock and reviewed by John Charles before they appear. Errors are corrected in the open under the corrections policy, and new posts are listed in the RSS feed as they publish.