A decision tree is a method used in machine learning that creates a tree-like model to predict the value of a target variable. Basically, you feed it some data (like a spreadsheet) and it predicts what one of the values will be.

Naturally, I wanted to use this model to look into my e-book sales. I decided to use my data from Google Books to find out how the book-buying process might look as a decision tree. Amazon is by far my biggest market, but they don’t provide any data on traffic. Google offers a surprisingly detailed report that you…

Today, I’ll identify some underused categories in the Kindle store. Choosing the right categories is vital to a book’s success. Amazon only allows you to select two categories, although it also lets you to choose more by using certain keywords. The right category for many books isn’t always obvious, especially when you consider the thousands upon thousands of subcategories you can use.

I’m particularly curious about categories that may have high demand and low supply. …

It’s easy to think privacy is not a concern if you obey the law and don’t do anything that would get you into trouble. Who cares if Gmail is reading your messages or Facebook saves your pictures? Why was privacy important if you have nothing to hide? However, privacy has deep implications for all of society. Governments and companies can assign penalties based on propensities, the models they use are frequently flawed, and there is no way to meaningfully consent or opt out.

Companies are able to use big data to make predictions about people, then “judge and punish them…

There are a lot of factors that go into success as an indie author. Productivity is only one of them. Quality is obviously a major influence, despite how hard it is to measure. Genre, advertising, and passive marketing also have an effect.

Still, writing more has to correlate with earning more. Amazon algorithms, as well as Kindle readers, have a short attention span. They’re always looking for what’s new and hot. There’s a rumored “30-day cliff” after which Amazon stops organically promoting books.

Since I have data on my word count and my earnings, I thought I’d see if the…

On this Medium blog, I plan to use statistics and programming to provide insights for indie authors — some general and some related to my personal career. So, who am I? I’ve been an independent author of romance novels since 2013. My undergrad was in environmental studies and English rhetoric and professional writing. In September 2020, I returned to school for a graduate certificate in business insights and analytics. I’ve been learning about statistics, coding, and databases, as well as the business environment, big data, accounting, and marketing. …

Christina Pierre

Self-publishes e-books. Studies business insights and analytics. Writes about insights for independent authors.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store