If you have any confusion about the code or want to report a bug, please open an issue instead of emailing me directly, and unfortunately I do not have exercise answers for the book.

Neal has more than 20 years of experience in financial and business journalism covering retail investing, airlines, pharmaceuticals, healthcare, sustainability, technology, and retail. He has worked ...

Troy Segal is an editor and writer. She has 20+ years of experience covering personal finance, wealth management, and business news. Toby Walters is a financial writer, investor, and lifelong learner.

Data collected under the Death in Custody Reporting Act has some serious problems. Here’s how we fixed some of them.

Classical conditioning is a way to learn using unconscious associations. Pavlov discovered classical conditioning when dogs started to salivate at the sound of a bell before they got food. The ...