Harlan D. Harris
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  • Communicating A/B Test Results for Conversion Rates with Ratios and Uncertainty Intervals

    calendar Aug 20, 2022 · 8 min read · a/b testing data science statistics  ·
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    A/B testing is a tool for supporting decision-making in business, and so in addition to getting the statistics right, it’s really important to communicate well with the non-statisticians who will have the final say on the go/no-go decision. Most A/B tests in practice are testing ratios, conversion rates of various …


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  • Staff Data Scientist: Comments on Will Larson's Staff Engineer Book

    calendar May 27, 2022 · 11 min read · data science job titles management  ·
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    I recently read Will Larson’s excellent book Staff Engineer: Leadership beyond the management track. Larson covers the individual contributor (IC, not management) roles that software engineers fill after they are promoted past Senior Software Engineer, with titles like Staff and Principal …


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  • A/B Testing and Product Ratings, Part 1: Delays and Bias

    calendar May 22, 2022 · 7 min read · data science analytics business statistics a/b testing  ·
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    Suppose you’re a data scientist at an e-commerce web site that sells shoes, responsible for supporting A/B tests. Many A/B tests are easy, and there are a number of companies that sell tools that make the easy cases as simple as clicking a few buttons and looking at pretty graphs. But A/B tests can get statistically …


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  • New Publications and Upcoming Talks

    calendar Sep 4, 2018 · 1 min read · algorithms conferences data science machine learning meetup software architecture  ·
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    Just a quick post here to note a few professional accomplishments: I just added a new publication to my vita – a peer-reviewed conference proceeedings article about abstractions for building repeated, related versions of similar predictive models. Check out some longer thoughts on Medium, or read the full …


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  • Stovetop Smoked Chinese Fish

    calendar May 13, 2018 · 3 min read · recipes  ·
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    I’ve been cooking a recipe recently of my own creation that I really like, and there isn’t much similar on the internet, so I’m sharing the recipe here. It’s a combination of two great things – hot-smoking fish with wood chips in a stovetop smoker, and the fermented flavors of Hunanese …


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  • How I Rewrite Recipes

    calendar Mar 25, 2018 · 4 min read · cooking recipes  ·
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    A thing that I do when I cook is to re-write the recipes I’m using (whether they’re from a cookbook or my own invention) onto a piece of paper in a very specific way. I think the approach I use is handy, so I’m describing it here in case you’d like to use it. (Or in case you need more evidence about how weird I am.) …


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  • On moving my blog from Wordpress to Blogdown

    calendar Mar 11, 2018 · 3 min read · meta R  ·
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    This is my first new post on harlan.harris.name for a while. The occasion is a change of scenery. For about 10 years, my primary blog has been on WordPress, more recently supplemented by Medium. But WordPress and Medium are limited for technical writing, and the trend among data people recently has been to publish …


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  • On How and When to Teach Layers of Abstraction in Programming

    calendar Oct 5, 2017 · 5 min read · programming R teaching computer science  ·
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    This post was originally published on Medium There’s recently been some interesting opinionated writing in the R statistical programming community about how and when to teach the abstracted, easy-to-use approaches to solving problems, versus the underlying nitty-gritty. David Robinson, Data Scientist at Stack Overflow, …


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  • A few things I learned from two small Data Science conferences

    calendar Jul 16, 2017 · 5 min read · data science machine learning conferences  ·
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    This post was originally published on Medium I recently attended two small conferences — the ISBIS (International Society for Business and Industrial Statistics) 2017 conference, held at IBM Research in Westchester County, and the Domino Data Lab Popup, held in West SoHo. I was invited to speak at ISBIS (slides here, …


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  • What do Data Scientists mean by “Scaling”?

    calendar Jun 9, 2017 · 7 min read · machine learning data science scaling software architecture  ·
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    This post was originally published on Medium Occasionally when chatting with other data scientists, especially with others who are interested in integrating predictive models into production software system, the word “scaling” comes up. Not this. Although some West Coast data scientists are into this kind of scaling …


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Featured Posts

  • Communicating A/B Test Results for Conversion Rates with Ratios and Uncertainty Intervals
  • Staff Data Scientist: Comments on Will Larson's Staff Engineer Book

Recent Posts

  • Communicating A/B Test Results for Conversion Rates with Ratios and Uncertainty Intervals
  • Staff Data Scientist: Comments on Will Larson's Staff Engineer Book
  • A/B Testing and Product Ratings, Part 1: Delays and Bias
  • New Publications and Upcoming Talks
  • Stovetop Smoked Chinese Fish
  • How I Rewrite Recipes
  • On moving my blog from Wordpress to Blogdown
  • On How and When to Teach Layers of Abstraction in Programming

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Harlan D. Harris

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