The 6 Dimensions of Data Quality - Completness
Missing data can look perfectly normal. How completeness failures distort analysis and the decisions that follow.
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Questions, experiments, data, and the people working with them. Every essay, in one place.
18 articles
Practicing Data Analysis Is Broken Too (Not Just Hiring)
Most analyst practice trains execution on clean toy problems instead of judgment under ambiguity.
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AI Broke Your Hiring Signals (You Just Haven’t Noticed Yet)
LLMs made polished take-homes and portfolios easier to fake, which breaks many old hiring signals.
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Why Hiring Data Analysts Is Still Broken (And We Pretend It’s Not)
Many analyst hiring processes still reward presentation polish and credential proxies over analytical judgment.
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Start by Not Touching the Data
Good analysis often starts by clarifying the question and the business context before touching the dataset.
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Stop Hiring the Resume: The Proxy-Metric Trap in Recruiting
The resume is a noisy proxy for competence, and teams confuse that proxy with evidence of actual analytical ability.
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What Can We Learn from Em-Dashes?
My wife always makes fun of me for mispronouncing words. Sometimes it’s an English word with the stress in the wrong place, sometimes it’s a Hebrew word where I arbitrarily decide where the wandering segol should go. I claim it’s part of…
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Well-defined processes and deserts
A process can be tightly defined and still be strategically wrong, especially when teams confuse structure with usefulness.
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How ChatGPT will change home assignments?
At this time, I’m thinking about breaking away from my usual customs, from my profession, or even from my generic pretense. I would like to speak about what is happening as if I were Nostradamus and let’s start from the end, or from the…
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First Data Job Interviews
I would like to start by saying that sometimes, there is no choice, and that is a very significant foreword.
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Statistics and analysts
Statistics matters for analysts, but mostly as a way to reason better rather than as a badge of mathematical purity.
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Dashboards are the problem, Not the solution
Dashboards often manufacture the feeling of clarity before a team has done the harder work of defining what matters.
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The Imposter Syndrome
So look, this post is going to be a bit of a downer, but I hope we can end it on a somewhat optimistic note.
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How to approach people you don't know on LinkedIn
I sometimes have the good fortune of receiving messages with more specific questions from people I don’t know.
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The Intransitivity of AB Tests
Winning comparisons in a sequence of A/B tests do not guarantee a clean global ranking of variants.
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The Greediness of AB Tests
A/B testing can optimize for local wins while quietly pushing teams away from broader learning.
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The Temporal Limitations of AB Testing
A/B test results are bounded by time, context, and population, even when the output looks statistically neat.
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What are the characteristics of good business analysis?
Good business analysis is repeatable, grounded in business rationale, and explicit about what action it makes possible.
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