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Market Basket Analysis

What sells together, and what's just coincidence

Market basket analysis identifies items that appear together more often than chance would predict. Golden ranks pairs by lift and shows when the data is too thin to support a bundle.

What sells together, and what's just coincidence
The problem

Your top pair is probably your two best sellers

Count which items show up together and the winner is almost always the two most popular things in the store. Jumbo bags go with jumbo bags because everybody buys jumbo bags.

Counting tells you what's popular. Bundles, cross-sells, and shelf placement need to know what's connected, which is a different question with different math.

The solution

Rank by surprise, then check the math

Golden ranks pairs by lift, how many times more often two items land together than chance would predict, so popularity stops drowning out real connections.

Every pairing has to clear a statistical bar before it shows up, groups of items that travel together get called out as bundles, and when your baskets can't support a conclusion, Golden says so.

Step by step

How it works

1

Golden spots the baskets

Any table shaped like a group and its items works: orders and products, respondents and answers, users and features. Golden needs at least 20 baskets that hold more than one thing.

2

It measures lift

For every pair: support (how often both show up), confidence in each direction, and lift (how many times more often they appear together than if they had nothing to do with each other). "Wooden Heart and Wooden Star land in the same basket 30x more often than chance."

3

It checks the math

A pair needs at least 1.5x lift, and the 95% confidence interval on that lift has to stay above 1. Golden gives you the pessimistic read too: "Even on a pessimistic reading the pairing holds at 23x."

4

It finds the bundles

When three items all pair with each other, Golden calls out the group, so you can treat them as one decision instead of three.

5

It tells you when there's nothing there

Small baskets spread the evidence thin. When no pairing beats chance once Golden accounts for how many it tested, the board says so in one sentence at the top. We'd rather tell you that than hand you a bundle built on luck.

Key capabilities

What you get

  1. 01
    A ranked pairs table plus a common-vs-surprising scatter of every pairing
  2. 02
    Confidence in both directions, because a rare item brings a common one along far more often than the reverse
  3. 03
    Click a pair to filter the board to the baskets that hold it
  4. 04
    Works for any basket: carts, survey answers, feature usage
Why it matters

A bad bundle costs real money

A bundle built on coincidence eats margin and shelf space. A real one shows up in the data months before anyone notices it in the store. Golden finds the real ones and is honest about the rest.

Next step

Find out what travels together

Sign up for early access and run a basket analysis on your own orders.

Market Basket Analysis | Product Affinity – Golden Analytics