01 / Writing
Writing.
Essays, white-paper reviews, and field notes from the desk.
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2026·APR·10
ESSAY
Simple vs. Stratified Sampling What's the Difference? In research, the best data you can feed a model is the whole population. After a decade of working with data, working with the entire population is almost n…6 min
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2026·APR·03
ESSAY
The Statistical Trick That Lets 1,000 People Represent Millions Growing up, watching the first presidential elections after the military dictatorship in Brazil caught my attention. I watched a very young governor take the …6 min
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2026·MAR·30
ESSAY
Central Limit Theorem The central limit theorem (CLT) is, arguably, the most important theorem in statistics. It is, in many cases, an introductory statistics course.6 min
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2026·MAR·27
ESSAY
All Models Are Wrong! ”All models are wrong, but some are useful.” Charles Box6 min
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2026·MAR·25
ESSAY
What Universal Optmization Works Best? No-Free-Lunch Theorem There are hundreds, if not thousands, of algorithms and statistical methods. When I first started in this field, the first method I tried in every single da…6 min
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2026·MAR·19
ESSAY
Unweighted and Weighted Logistic Regression Models Even after so many years, I still remember one of my very first logistic regression projects. I was so proud of it. Until my supervisor kicked it back and told …6 min
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2026·MAR·16
ESSAY
The AI Bubble Nobody Wants to Talk About There isn't one day when I open the news or social media that I don't come across AI news.6 min
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2026·MAR·12
ESSAY
What Are Vector Embeddings? Is vector embedding one of those buzzwords in data science? What are they and why are they important? In short, they are decoders or translators, essential f…6 min
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2026·MAR·12
ESSAY
Why P-Values Don't Mean What Most People Think They Mean Very early in my PhD program, I began working with and testing hypotheses. One of the first challenges I had to overcome was understanding the p-value.6 min
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2026·MAR·09
ESSAY
What is Bias and Variance Tradeoff You don't want the model to over- or under-fit. You have to strive to find the right balance between the two. That is the bias-variance tradeoff.6 min
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2025·DEC·23
ESSAY
Why Data Science Projects Fail and How to Avoid It Not long ago, I sat with an apartment owner who had taken over 144 units. There were 15 vacant, 12 on move-out notice, and four evictions for the end of the mon…6 min
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2025·DEC·09
ESSAY
Amazon Ships Before You Order—Here's How Your Business Can Do the Same Amazon ships products before you order them. And it's been doing it for over a decade.6 min
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2025·DEC·02
ESSAY
Property Files #2: When the System Fails Everyone I debated whether to share this story. Evictions are one of the most difficult parts of property management—and one of the least understood or perceived as …6 min
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2025·NOV·25
ESSAY
The Silent Profit Killer: How Utilities Drain Multifamily NOI As a vendor in the multifamily industry, I was constantly visiting properties, talking to managers, maintenance technicians, and occasionally, owners.6 min
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2025·NOV·17
ESSAY
Property Files #1: Becoming a Manager 54% occupancy. 20% delinquency. 4 hours of training. My first property management job taught me why data matters—the hard way.6 min
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2025·NOV·10
ESSAY
Pareto Analysis in Action: Optimizing Multifamily Maintenance Operations Italian economist Vilfredo Pareto found that 20% of Italy's population received 80% of the country's income. This became known as Pareto's principle, also known…6 min
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2025·OCT·26
ESSAY
Why Your Property Needs a Dashboard The multifamily industry is heavy on reporting. None of the most common software packages provides the reports that most owners or managers require. That's why …6 min
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2025·OCT·19
ESSAY
The Hidden Lesson of Operation Analysis There is never a dull moment when working in the multifamily industry. Many years ago, my first job right out of college was for a property management company w…6 min
- 2025·OCT·02 ESSAY 6 min
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2025·SEP·25
ESSAY
Frequentist vs Bayesian A/B Testing Thinking Every business decision is a gamble—some just have higher stakes than others. Personally, I tend to be decisive and rarely get lost in "what ifs." Now, in busin…6 min
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2025·SEP·18
ESSAY
The Last Mile Problem in Data Science Communication The crowded conference room, filled with dark suits, looked at me blankly. Somewhere along the way, I had lost my audience. It was not until I went back a slide…6 min
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2025·SEP·11
ESSAY
The Rise of Vibe Coding: Why is AI Changing How We Work? I'm an lifelong learner. I love to delve into new things. I'm captivated by knowledge. That is part of the reason why I became fascinated with data. It has not …6 min